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2012-05-09ixgbe: Set Drop_EN bit when multiple Rx queues are present w/o flow controlAlexander Duyck
The drop enable bit can be used to improve the performance of the adapter in the case of multiple queues being present. This performance gain is due to the fact that some slower CPUs can cause the FIFO to backfill preventing faster CPUs from receiving additional work. By setting the drop enable bit we prevent this and instead just drop the packets that would have been bound for the slower CPU. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Tested-by: Ross Brattain <ross.b.brattain@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2012-05-09ixgbe: Clean up priority based flow controlAlexander Duyck
This change cleans up the logic in the priority based flow control configuration routines. Both the 82599 and 82598 based routines perform similar functions however they are both arranged completely differently. This patch goes over both of them to clean up the code. In addition I am dropping the ixgbe_fc_pfc flow control mode and instead just replacing it with checks for if priority flow control is enabled. This allows us to maintain some of the link flow control information which allows for an easier transition between link and priority flow control. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Tested-by: Ross Brattain <ross.b.brattain@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2012-05-09ixgbe: Exit on error case in VF message processingAlexander Duyck
Previously we would get a mailbox error and still process the message. Instead we should exit on error. In addition we should also be flushing the ACK of the message so that we can guarantee that the other end is aware we have received the message while we are processing it. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Tested-by: Sibai Li <sibai.li@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2012-05-09igb: output register's information related to RX/TX queue[4-15]Koki Sanagi
Current igb outputs registers related to TX/RX queues(ex. RDT, RDH, TDT, TDH). But it thinks the number of RX/TX queues is 4. But 82576 has 16 RX/TX queues. This patch modifies igb to output the rest of the registers if the device is 82576. Signed-off-by: Koki Sanagi <sanagi.koki@jp.fujitsu.com> Acked-by: Carolyn Wyborny <carolyn.wyborny@intel.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2012-05-09Merge branch 'master' of ↵Jeff Kirsher
git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2012-05-09sparc: fix build fail in mm/init_64.c when NEED_MULTIPLE_NODES is offPaul Gortmaker
Commit 625d693e9784f988371e69c2b41a2172c0be6c11 (linux-next) "sparc64: Convert over to NO_BOOTMEM." causes the following compile failure for sparc64 allnoconfig: arch/sparc/mm/init_64.c:822:16: error: unused variable 'paddr' arch/sparc/mm/init_64.c:1759:7: error: unused variable 'node' arch/sparc/mm/init_64.c:809:12: error: 'memblock_nid_range' defined but not used The paddr decl can easily be shuffled within the ifdef. The memblock_nid_range is just a stub function for when NEED_MULTIPLE_NODES is off, but the only caller is within a NEED_MULTIPLE_NODES enabled section, so we can simply delete it. The unused "node" is slightly more interesting. In the case of "# CONFIG_NEED_MULTIPLE_NODES is not set" we no longer get the definition of: #define NODE_DATA(nid) (node_data[nid]) from arch/sparc/include/asm/mmzone.h - but instead we get: #define NODE_DATA(nid) (&contig_page_data) from include/linux/mmzone.h -- and since the arg is ignored, the thing really is unused. Rather than put in a confusing looking __maybe_unused, simply splitting the declaration from the assignment seemed to me to be the least offensive. Cc: Sam Ravnborg <sam@ravnborg.org> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-09netxen_nic: Fix estimation of recv MSS in case of LRORajesh Borundia
o Linux stack estimates MSS from skb->len or skb_shinfo(skb)->gso_size. In case of LRO skb->len is aggregate of len of number of packets hence MSS obtained using skb->len would be incorrect. Incorrect estimation of recv MSS would lead to delayed acks in some traffic patterns (which sends two or three packets and wait for ack and only then send remaining packets). This leads to drop in performance. Hence we need to set gso_size to MSS obtained from firmware. o This is fixed recently in firmware hence the MSS is obtained based on capability. If fw is capable of sending the MSS then only driver sets the gso_size. Signed-off-by: Rajesh Borundia <rajesh.borundia@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-09netxen: added miniDIMM support in driver.Sucheta Chakraborty
Driver queries DIMM information from firmware and accordingly sets "presence" field of the structure. "presence" field when set to 0xff denotes invalid flag. And when set to 0x0 denotes DIMM memory is not present. Signed-off-by: Sucheta Chakraborty <sucheta.chakraborty@qlogic.com> Signed-off-by: Rajesh Borundia <rajesh.borundia@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-09netxen_nic: Allow only useful and recommended firmware dump capture mask valuesManish chopra
o 0x3, 0x7, 0xF, 0x1F, 0x3F, 0x7F and 0xFF are the allowed capture masks. Signed-off-by: Manish chopra <manish.chopra@qlogic.com> Signed-off-by: Rajesh Borundia <rajesh.borundia@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-09netxen_nic: disable minidump by defaultSritej Velaga
disable fw dump by default at start up. Signed-off-by: Sritej Velaga <sritej.velaga@qlogic.com> Signed-off-by: Rajesh Borundia <rajesh.borundia@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-09Merge branch 'for-davem' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/bwh/sfc-next
2012-05-09Merge branch 'sfc-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/bwh/sfcDavid S. Miller
2012-05-10sfc: Implement module EEPROM access for SFE4002 and SFN4112FBen Hutchings
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-05-10sfc: Added support for new ethtool APIs for obtaining module eepromStuart Hodgson
Currently allows for SFP+ eeprom to be returned using the ethtool API. This can be extended in future to handle different eeprom formats and sizes Signed-off-by: Stuart Hodgson <smhodgson@solarflare.com> [bwh: Drop redundant validation, comment, whitespace] Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-05-10ethtool: Extend the ethtool API to obtain plugin module eeprom dataStuart Hodgson
ETHTOOL_GMODULEINFO returns a new struct ethtool_modinfo that will return the type and size of plug-in module eeprom (such as SFP+) for parsing by userland program. ETHTOOL_GMODULEEEPROM returns the raw eeprom information using the existing ethtool_eeprom structture to return the data Signed-off-by: Stuart Hodgson <smhodgson@solarflare.com> Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-05-10ethtool: Split ethtool_get_eeprom() to allow for additional EEPROM accessorsBen Hutchings
We want to support reading module (SFP+, XFP, ...) EEPROMs as well as NIC EEPROMs. They will need a different command number and driver operation, but the structure and arguments will be the same and so we can share most of the code here. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-05-10sfc: By default refill RX rings as soon as space for a batchDavid Riddoch
Previously we refilled with much larger batches, which caused large latency spikes. We now have many more much much smaller spikes! Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-05-10sfc: Fill RX rings completely full, rather than to 95% fullDavid Riddoch
There was no runtime control of the fast_fill_limit in any case, so purged that field. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-05-10sfc: Fix missing cleanup in failure path of efx_pci_probe()Ben Hutchings
We need to clear the private data pointer in the PCI device. Also reorder cleanup in efx_pci_remove() for symmetry. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-05-10sfc: Do not attempt to flush queues if DMA is disabledStuart Hodgson
efx_nic_fatal_interrupt() disables DMA before scheduling a reset. After this, we need not and *cannot* flush queues. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-05-09dsa: Convert compare_ether_addr to ether_addr_equalJoe Perches
Use the new bool function ether_addr_equal to add some clarity and reduce the likelihood for misuse of compare_ether_addr for sorting. Done via cocci script: $ cat compare_ether_addr.cocci @@ expression a,b; @@ - !compare_ether_addr(a, b) + ether_addr_equal(a, b) @@ expression a,b; @@ - compare_ether_addr(a, b) + !ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) == 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) != 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) == 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) != 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !!ether_addr_equal(a, b) + ether_addr_equal(a, b) Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-09wireless: Convert compare_ether_addr to ether_addr_equal by handJoe Perches
spatch/coccinelle isn't perfect. It doesn't understand __aligned(x) and doesn't convert functions it can't parse. Convert the remaining compare_ether_addr uses. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-09wireless: Convert compare_ether_addr to ether_addr_equalJoe Perches
Use the new bool function ether_addr_equal to add some clarity and reduce the likelihood for misuse of compare_ether_addr for sorting. I removed a conversion from scan.c/cmp_bss_core that appears to be a sorting function. Done via cocci script: $ cat compare_ether_addr.cocci @@ expression a,b; @@ - !compare_ether_addr(a, b) + ether_addr_equal(a, b) @@ expression a,b; @@ - compare_ether_addr(a, b) + !ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) == 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) != 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) == 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) != 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !!ether_addr_equal(a, b) + ether_addr_equal(a, b) Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-09netfilter: Convert compare_ether_addr to ether_addr_equalJoe Perches
Use the new bool function ether_addr_equal to add some clarity and reduce the likelihood for misuse of compare_ether_addr for sorting. Done via cocci script: $ cat compare_ether_addr.cocci @@ expression a,b; @@ - !compare_ether_addr(a, b) + ether_addr_equal(a, b) @@ expression a,b; @@ - compare_ether_addr(a, b) + !ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) == 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) != 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) == 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) != 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !!ether_addr_equal(a, b) + ether_addr_equal(a, b) Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-09mac80211: Convert compare_ether_addr to ether_addr_equal by handJoe Perches
spatch/coccinelle isn't perfect. It doesn't understand __aligned(x) and doesn't convert functions it can't parse. Convert the remaining compare_ether_addr uses. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-09mac80211: Convert compare_ether_addr to ether_addr_equalJoe Perches
Use the new bool function ether_addr_equal to add some clarity and reduce the likelihood for misuse of compare_ether_addr for sorting. Done via cocci script: $ cat compare_ether_addr.cocci @@ expression a,b; @@ - !compare_ether_addr(a, b) + ether_addr_equal(a, b) @@ expression a,b; @@ - compare_ether_addr(a, b) + !ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) == 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) != 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) == 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) != 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !!ether_addr_equal(a, b) + ether_addr_equal(a, b) Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-09bluetooth: Convert compare_ether_addr to ether_addr_equalJoe Perches
Use the new bool function ether_addr_equal to add some clarity and reduce the likelihood for misuse of compare_ether_addr for sorting. Done via cocci script: $ cat compare_ether_addr.cocci @@ expression a,b; @@ - !compare_ether_addr(a, b) + ether_addr_equal(a, b) @@ expression a,b; @@ - compare_ether_addr(a, b) + !ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) == 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) != 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) == 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) != 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !!ether_addr_equal(a, b) + ether_addr_equal(a, b) Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-09atm: Convert compare_ether_addr to ether_addr_equalJoe Perches
Use the new bool function ether_addr_equal to add some clarity and reduce the likelihood for misuse of compare_ether_addr for sorting. Done via cocci script: $ cat compare_ether_addr.cocci @@ expression a,b; @@ - !compare_ether_addr(a, b) + ether_addr_equal(a, b) @@ expression a,b; @@ - compare_ether_addr(a, b) + !ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) == 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) != 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) == 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) != 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !!ether_addr_equal(a, b) + ether_addr_equal(a, b) Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-09bridge: Convert compare_ether_addr to ether_addr_equalJoe Perches
Use the new bool function ether_addr_equal to add some clarity and reduce the likelihood for misuse of compare_ether_addr for sorting. Done via cocci script: $ cat compare_ether_addr.cocci @@ expression a,b; @@ - !compare_ether_addr(a, b) + ether_addr_equal(a, b) @@ expression a,b; @@ - compare_ether_addr(a, b) + !ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) == 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) != 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) == 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) != 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !!ether_addr_equal(a, b) + ether_addr_equal(a, b) Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-09bridge: netfilter: Convert compare_ether_addr to ether_addr_equalJoe Perches
Use the new bool function ether_addr_equal to add some clarity and reduce the likelihood for misuse of compare_ether_addr for sorting. Done via cocci script: $ cat compare_ether_addr.cocci @@ expression a,b; @@ - !compare_ether_addr(a, b) + ether_addr_equal(a, b) @@ expression a,b; @@ - compare_ether_addr(a, b) + !ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) == 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) != 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) == 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) != 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !!ether_addr_equal(a, b) + ether_addr_equal(a, b) Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-098021q: Convert compare_ether_addr to ether_addr_equalJoe Perches
Use the new bool function ether_addr_equal to add some clarity and reduce the likelihood for misuse of compare_ether_addr for sorting. Done via cocci script: $ cat compare_ether_addr.cocci @@ expression a,b; @@ - !compare_ether_addr(a, b) + ether_addr_equal(a, b) @@ expression a,b; @@ - compare_ether_addr(a, b) + !ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) == 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) != 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) == 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) != 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !!ether_addr_equal(a, b) + ether_addr_equal(a, b) Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-09802: Convert compare_ether_addr to ether_addr_equalJoe Perches
Use the new bool function ether_addr_equal to add some clarity and reduce the likelihood for misuse of compare_ether_addr for sorting. Done via cocci script: $ cat compare_ether_addr.cocci @@ expression a,b; @@ - !compare_ether_addr(a, b) + ether_addr_equal(a, b) @@ expression a,b; @@ - compare_ether_addr(a, b) + !ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) == 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !ether_addr_equal(a, b) != 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) == 0 + !ether_addr_equal(a, b) @@ expression a,b; @@ - ether_addr_equal(a, b) != 0 + ether_addr_equal(a, b) @@ expression a,b; @@ - !!ether_addr_equal(a, b) + ether_addr_equal(a, b) Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-09etherdevice.h: Add ether_addr_equalJoe Perches
Add a boolean function to check if 2 ethernet addresses are the same. This is to avoid any confusion about compare_ether_addr returning an unsigned, and not being able to use the compare_ether_addr function for sorting ala memcmp. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-10regulator: wm831x: Register all normal regulatorsMark Brown
Register all normal regulators rather than skipping unconfigured ones now that the core can handle regulators without init data. Skip the boost and isink regulators since they are normally controlled by other drivers. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-05-09usb-gadget: Initial merge of target module for UASP + BOTSebastian Andrzej Siewior
This fabric uses the target framework to provide a usb gadget device. This gadget supports the USB Attached SCSI Protocol (UASP) and Bulk Only Transfers (BOT or BBB). BOT is the primary interface, UAS is the alternative interface. It has been tested with dummy_hcd on HS and SS. On SS USB3 are supported. I also took my omap device and tried it there against WindowsXP. UAS implements basic command passing (i.e. read/write requests) and TASK MANAGEMENT functions are missing. I had to add a little of error recovery to BOT because Windows was issuing some strange commands and it does not complain after the gadget responded with CSW.status=1. (nab: Move to drivers/usb/gadget as per Sebastian to address legacy limitations for built-in gadget code) Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Acked-by: Felipe Balbi <balbi@ti.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Christoph Hellwig <hch@lst.de> Cc: Greg KH <gregkh@linuxfoundation.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2012-05-09target: Remove max_sectors device attribute for modern se_task less codeNicholas Bellinger
This patch removes the original usage of dev_attr->max_sectors in favor of dev_attr->hw_max_sectors that is now being enforced by target core from within transport_generic_cmd_sequencer() for SCF_SCSI_DATA_SG_IO_CDB ops. After the recent se_task removal patches from hch, this value for IBLOCK backends being set via configfs by userspace from an saved max_sectors value that is turning out to be problematic, so it makes sense to go ahead and remove this now legacy attribute all-together. This patch also continues to make se_dev_set_default_attribs() do (sectors / block_size) alignment for what actually get used by target_core_mod to be safe here, following the same alignment currently used by fabric_max_sectors. Reported-by: Andy Grover <agrover@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2012-05-09Merge git://1984.lsi.us.es/net-nextDavid S. Miller
2012-05-09target: lock => unlock typo in transport_lun_wait_for_tasksDan Carpenter
target_stop_cmd() returns with the lock held and IRQs disabled. The intent was to unlock here. This bug was originally added with: commit cf572a9627c9ae86082216de109780c1d2e2ee28 Author: Christoph Hellwig <hch@infradead.org> Date: Tue Apr 24 00:25:05 2012 -0400 target: move the state and execute lists to the command Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2012-05-09target: Enforce hw_max_sectors for SCF_SCSI_DATA_SG_IO_CDBNicholas Bellinger
Instead of depending upon a max_sectors value that may be set via configfs based upon original HW queue limitations, go ahead and convert to using the hw_max_sectors reported by the backend device in order to determine when to reject an I/O's who's sector count exceeds what is supported by the backend with a single se_cmd descriptor. It addresses a potential case where se_dev_attrib.max_sectors for IBLOCK backends has already been set via queue_max_sectors() to something small like max_sectors=32 (LVM, DRBD may do this), resulting typically sized SCF_SCSI_DATA_SG_IO_CDB to be incorrectly rejected with invalid_cdb_field in transport_generic_cmd_sequencer(). Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Roland Dreier <roland@purestorage.com> Cc: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2012-05-09rcu: Make rcu_barrier() less disruptivePaul E. McKenney
The rcu_barrier() primitive interrupts each and every CPU, registering a callback on every CPU. Once all of these callbacks have been invoked, rcu_barrier() knows that every callback that was registered before the call to rcu_barrier() has also been invoked. However, there is no point in registering a callback on a CPU that currently has no callbacks, most especially if that CPU is in a deep idle state. This commit therefore makes rcu_barrier() avoid interrupting CPUs that have no callbacks. Doing this requires reworking the handling of orphaned callbacks, otherwise callbacks could slip through rcu_barrier()'s net by being orphaned from a CPU that rcu_barrier() had not yet interrupted to a CPU that rcu_barrier() had already interrupted. This reworking was needed anyway to take a first step towards weaning RCU from the CPU_DYING notifier's use of stop_cpu(). Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2012-05-09rcu: Explicitly initialize RCU_FAST_NO_HZ per-CPU variablesPaul E. McKenney
The current initialization of the RCU_FAST_NO_HZ per-CPU variables makes needless and fragile assumptions about the initial value of things like the jiffies counter. This commit therefore explicitly initializes all of them that are better started with a non-zero value. It also adds some comments describing the per-CPU state variables. Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2012-05-09rcu: Make RCU_FAST_NO_HZ handle timer migrationPaul E. McKenney
The current RCU_FAST_NO_HZ assumes that timers do not migrate unless a CPU goes offline, in which case it assumes that the CPU will have to come out of dyntick-idle mode (cancelling the timer) in order to go offline. This is important because when RCU_FAST_NO_HZ permits a CPU to enter dyntick-idle mode despite having RCU callbacks pending, it posts a timer on that CPU to force a wakeup on that CPU. This wakeup ensures that the CPU will eventually handle the end of the grace period, including invoking its RCU callbacks. However, Pascal Chapperon's test setup shows that the timer handler rcu_idle_gp_timer_func() really does get invoked in some cases. This is problematic because this can cause the CPU that entered dyntick-idle mode despite still having RCU callbacks pending to remain in dyntick-idle mode indefinitely, which means that its RCU callbacks might never be invoked. This situation can result in grace-period delays or even system hangs, which matches Pascal's observations of slow boot-up and shutdown (https://lkml.org/lkml/2012/4/5/142). See also the bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=806548 This commit therefore causes the "should never be invoked" timer handler rcu_idle_gp_timer_func() to use smp_call_function_single() to wake up the CPU for which the timer was intended, allowing that CPU to invoke its RCU callbacks in a timely manner. Reported-by: Pascal Chapperon <pascal.chapperon@wanadoo.fr> Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2012-05-09cifs: fix revalidation test in cifs_llseek()Dan Carpenter
This test is always true so it means we revalidate the length every time, which generates more network traffic. When it is SEEK_SET or SEEK_CUR, then we don't need to revalidate. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2012-05-09Merge tag 'fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM: SoC fixes from Olof Johansson: "Things have slowed down a lot for us, but we have five more fixes for omap and kirkwood below. Three are for boards setup issues, two are SoC-level fixes." * tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: ARM: OMAP: igep0020: fix smsc911x dummy regulator id ARM: orion5x: Fix GPIO enable bits for MPP9 ARM: kirkwood: add missing kexec.h include ARM: OMAP: Revert "ARM: OMAP: ctrl: Fix CONTROL_DSIPHY register fields" ARM: OMAP1: Amstrad Delta: Fix wrong IRQ base in FIQ handler
2012-05-09Merge tag 'regmap-3.4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap Pull last minute regman bug fix from Mark Brown: "This is a last minute bug fix that was only just noticed since the code path that's being exercised here is one that is fairly rarely used. The changelog for the change itself is extremely clear and the code itself is obvious to inspection so should be pretty safe." * tag 'regmap-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap: regmap: fix possible memory corruption in regmap_bulk_read()
2012-05-09ARM: OMAP: igep0020: Specify the VPLL2 regulator unconditionallyLaurent Pinchart
The supply is connected to the DSS DO-D5 pins and is thus needed for both serial and parallel display interfaces on the igep0030 as well as the igep0020. If the igep0030 module isn't connected to a display, no DSI or DPI display will be specified in board code, and the DSS driver won't enable to VPLL2 regulator anyway. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Enric Balletbo i Serra <eballetbo@gmail.com> Tested-by: Enric Balletbo i Serra <eballetbo@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-05-09Merge git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull KVM fixes from Avi Kivity: "Two asynchronous page fault fixes (one guest, one host), a powerpc page refcount fix, and an ia64 build fix." * git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: ia64: fix build due to typo KVM: PPC: Book3S HV: Fix refcounting of hugepages KVM: Do not take reference to mm during async #PF KVM: ensure async PF event wakes up vcpu from halt
2012-05-09Merge branch 'merge' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc Pull powerpc fixes from Benjamin Herrenschmidt: "Here are a couple of last minute fixes for 3.4 for regressions introduced by my rewrite of the lazy irq masking code." * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: powerpc/irq: Make alignment & program interrupt behave the same powerpc/irq: Fix bug with new lazy IRQ handling code
2012-05-09ARM: OMAP2+: INTC: fix Kconfig option for TI81XXKevin Hilman
The INTC core is using a Kconfig option for TI816x which doesn't exist. Convert it to use TI81XX. Cc: Hemant Pedanekar <hemantp@ti.com> Signed-off-by: Kevin Hilman <khilman@ti.com> Acked-by: Vaibhav Hiremath <hvaibhav@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-05-09ARM: OMAP2+: remove incorrect irq_chip ack fieldGrazvydas Ignotas
Each irq_chip for the main interrupt controller has offsets set for irq masking registers, which added to respective base results in a pointer to appropriate hardware register. However this is not correct for INTC_CONTROL as there is only one INTC_CONTROL register. This does not cause problems because generic ack code is never called, but remove this assignment to avoid confusion. Signed-off-by: Grazvydas Ignotas <notasas@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
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