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2012-01-16ARM: versatile: Add missing ENDPROC to headsmp.SPawel Moll
Once the ENDPROC is in place, BSYM() in not longer necessary to get correct pointer to versatile_secondary_startup(). Tested-by: Jon Medhurst <tixy@linaro.org> Signed-off-by: Pawel Moll <pawel.moll@arm.com> Acked-by: Dave Martin <dave.martin@linaro.org>
2012-01-16[media] Add registers names to XC2028 tuner from datahseet and use themMiroslav Slugen
Signed-off-by: Miroslav Slugen <thunder.mmm@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] xc4000: add support for signal strength measuresMiroslav Slugen
In xc4000 chipsets real signal and noise level is stored in register 0x0A and 0x0B,so we can use those registers to monitor signal strength. I tested this patch on 2 different cards Leadtek DVR3200 and DTV2000H Plus, both with same results, I used special antenna hubs (toner 4x, 6x, 8x and 12x) with mesured signal lost, both registers are in dB value, first represent signal with limit value -113.5dB (should be -114dB) and exactly match with test results. Second represents noise level also in dB and there is no maximum value, but from tests we can drop everything above 32dB which tuner realy can't use, signal was usable till 20dB noise level. In digital mode we can take signal strength but sadly noise level is not relevant and real value is stored in demodulator for now just zl10353, also digital mode is just for testing, because it needs changing other parts of code which reads data only from demodulator. In analog mode I was able to test only FM radio, signal level is not important, it says something about cable and hub losts, but nothing about real quality of reception, so even if we have signal level at minimum 113dB we can still here radio, because of that it is displaied only in debug mode, but for real signal level is used noise register which is again very accurate, radio noise level was betwen 6-20dB for good signal, 20-25dB for medium signal, and above 25dB signal is unusable. For now real benefit of this patch is only for FM radio mode. Signed-off-by: Miroslav Slugen <thunder.mmm@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] tuner: Fix numberspace conflict between xc4000 and pti 5nf05 tunersMiroslav Slugen
Update xc4000 tuner definition, number 81 is already in use by TUNER_PARTSNIC_PTI_5NF05. Cc: stable@kernel.org Signed-off-by: Miroslav Slugen <thunder.mmm@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] cx88: fix: don't duplicate xc4000 entry for radioMiroslav Slugen
All radio tuners in cx88 driver using same address for radio and tuner, so there is no need to probe it twice for same tuner and we can use radio_type UNSET, this also fix broken radio since kernel 2.6.39-rc1 for those tuners. Cc: stable@kernel.org Signed-off-by: Miroslav Slugen <thunder.mmm@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] cx23885: Don't duplicate xc4000 entry for radioMiroslav Slugen
All radio tuners in cx23885 driver using same address for radio and tuner, so there is no need to probe it twice for same tuner and we can use radio_type UNSET. Be aware radio support in cx23885 is not yet committed, so this is only minor fix for future support. Signed-off-by: Miroslav Slugen <thunder.mmm@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] cx23885-dvb: check if dvb_attach() succededMiroslav Slugen
Fix possible null dereference for Leadtek DTV 3200H XC4000 tuner when no firmware file available. Cc: stable@kernel.org Signed-off-by: Miroslav Slugen <thunder.mmm@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] cx231xx: dereferencing NULL after allocation failureDan Carpenter
"dev" is NULL here so we should use "nr" instead of "dev->devno". Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16menuconfig: fix a regression when canceling the prompt dialog at exitLi Zefan
This commit fixes a bug, while introducing a new one.. commit 7203ddbd4be9720649e47d756a001e0c7d7f8ae2 Author: Wang YanQing <udknight@gmail.com> Date: Thu Jan 12 11:31:32 2012 +0800 menuconfig: let make not report error when not save configuration Pressing ESC should cancel the yes/no dialog and return back to the main menu, but not exit from menuconfig. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: Wang YanQing <udknight@gmail.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
2012-01-16[media] mb86a20s: fix off by one checksDan Carpenter
Clearly ">=" was intended here instead of ">". Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] pwc: Simplify leds parameter parsingHans de Goede
This reduces our module init to a simple usb_register() call, so that we can make use of the new upcoming macro's for this. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] pwc: Remove dev_hint module parameterHans de Goede
The code for this is rather crufty, and being able to tie a device to a specific minor is not really something we want to support in a modern udev based world. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] pwc: Use one shared usb command bufferHans de Goede
The pwc driver used to: 1. kmalloc a buffer 2. memcpy data to send over usb there 3. do the usb_control_msg call (which does not work with data on the stack) 4. free the buffer For every usb command send. This patch changes the code to instead malloc a buffer for this purpose once and use it everywhere. [mchehab@redhat.com: Fix a compilation breakage with allyesconfig: drivers/media/video/pwc/pwc-ctrl.c: In function ‘pwc_get_cmos_sensor’: drivers/media/video/pwc/pwc-ctrl.c:546:3: warning: passing argument 4 of ‘recv_control_msg’ makes integer from pointer without a cast [en$ drivers/media/video/pwc/pwc-ctrl.c:107:12: note: expected ‘int’ but argument is of type ‘unsigned char *’ drivers/media/video/pwc/pwc-ctrl.c:546:3: error: too many arguments to function ‘recv_control_msg’ drivers/media/video/pwc/pwc-ctrl.c:107:12: note: declared here] Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] pwc: Avoid unnecessarily rebuilding the decoder tablesHans de Goede
Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] pwc: Avoid sending mode info to the camera when it is not neededHans de Goede
Since we always do a set_video_mode on stream start, there is no need to actually send the mode info to the device on a s_fmt / s_parm ioctl. Not doing this saves us doing (slow) usb io. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] pwc: Fix pixfmt handlingHans de Goede
Before this patch various code in the mode setting patch checked pdev->pixfmt, but that was not set until the mode setting succeeded, so it was looking at the old pixfmt! This patch fixes this by making the pixfmt a parameter to set_video_mode, and setting it from set_video_mode on success. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] pwc: Make decoder data part of the main pwc structHans de Goede
Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] pwc: Make fps runtime configurable through s_parm, drop fps module paramHans de Goede
Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16netfilter: revert user-space expectation helper supportPablo Neira Ayuso
This patch partially reverts: 3d058d7 netfilter: rework user-space expectation helper support that was applied during the 3.2 development cycle. After this patch, the tree remains just like before patch bc01bef, that initially added the preliminary infrastructure. I decided to partially revert this patch because the approach that I proposed to resolve this problem is broken in NAT setups. Moreover, a new infrastructure will be submitted for the 3.3.x development cycle that resolve the existing issues while providing a neat solution. Since nobody has been seriously using this infrastructure in user-space, the removal of this feature should affect any know FOSS project (to my knowledge). Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-01-16netfilter: xt_hashlimit: fix unused variable warning if IPv6 disabledStephen Rothwell
Fixes this warning when CONFIG_IP6_NF_IPTABLES is not enabled: net/netfilter/xt_hashlimit.c: In function ‘hashlimit_init_dst’: net/netfilter/xt_hashlimit.c:448:9: warning: unused variable ‘frag_off’ [-Wunused-variable] Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-01-16[media] ivtv: remove open_id/id from the filehandle codeHans Verkuil
Instead of messing around with id's it's much easier to just compare against a filehandle pointer. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Acked-by: Andy Walls <awalls@md.metrocast.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] ivtv: switch to the v4l core lockHans Verkuil
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Acked-by: Andy Walls <awalls@md.metrocast.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] cx18: remove exclusive open of radio deviceHans Verkuil
For some reason the cx18 driver could open the radio device only once. Remove this limitation. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Acked-by: Andy Walls <awalls@md.metrocast.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] ivtv: remove exclusive radio openHans Verkuil
For some reason the /dev/radio device was implemented as an exclusive open: you could open it only once and not a second time. Remove this limitation. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Acked-by: Andy Walls <awalls@md.metrocast.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] v4l2-ioctl: make tuner 'type' check more strict for S_FREQUENCYHans Verkuil
As per the feature removal document, make the tuner type check more strict so that it is no longer possible to set the radio frequency through a video node or the TV frequency through a radio node. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] V4L2 Spec: improve the G/S_INPUT/OUTPUT documentationHans Verkuil
As Rupert pointed out, the phrase "It is good practice" should be replaced with "You must". Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Cc: Rupert Eibauer <Rupert.Eibauer@ces.ch> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] V4L2 Spec: fix extended control documentationHans Verkuil
Update the spec to the behavior implemented by the control framework. This should have been documented long ago but for some reason it was never done. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] omap_vout: add missing OVERLAY_OUTPUT cap and set V4L2_FBUF_FLAG_OVERLAYHans Verkuil
The omap_vout driver has an output overlay, but never advertised that capability. The driver should also set the V4L2_FBUF_FLAG_OVERLAY flag. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> CC: Archit Taneja <archit@ti.com> CC: Vaibhav Hiremath <hvaibhav@ti.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] zoran: do not set V4L2_FBUF_FLAG_OVERLAYHans Verkuil
The zoran driver does not support this flag, so don't set it. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] v4l2 spec: clarify usage of V4L2_FBUF_FLAG_OVERLAYHans Verkuil
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16[media] cx23885: handle errors from videobuf_dvb_get_frontend()Dan Carpenter
The error handling in the original code wasn't complete so static checkers complained about a potential NULL deference. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-01-16ALSA: virtuoso: Xonar DS: fix polarity of front outputClemens Ladisch
The two DACs for the front output and the surround/center/LFE/back outputs are wired up out of phase, so when channels are duplicated, their sound can cancel out each other and result in a weaker bass response. To fix this, reverse the polarity of the neutron flow to the front output. Reported-any-tested-by: Daniel Hill <daniel@enemyplanet.geek.nz> Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Cc: 2.6.34+ <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-01-16ALSA: Au88x0 - Reduce the number of playback subdevices of au8830 from 32 to 16Raymond Yau
- The maximum number of playback streams depend on the number of sample rate conveters (16) and the number of DMA channels (32). Signed-off-by: Raymond Yau <superquad.vortex2@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-01-16ALSA: Au88x0 - Support 4 channels playback when AC97 codecs has SDAC bitRaymond Yau
- Check SDAC bit of AC97 codec for supporting 4 channels playback. Signed-off-by: Raymond Yau <superquad.vortex2@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-01-16ALSA: HDA: Fix internal microphone on Dell Studio 16 XPS 1645David Henningsson
More than one user reports that changing the model from "both" to "dmic" makes their Internal Mic work. Cc: stable@kernel.org Tested-by: Martin Ling <martin-launchpad@earth.li> BugLink: https://bugs.launchpad.net/bugs/795823 Signed-off-by: David Henningsson <david.henningsson@canonical.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2012-01-16ARM: OMAP3: fix build on !CONFIG_IOMMU_APIOhad Ben-Cohen
omap3isp depends on CONFIG_IOMMU_API, so avoid registering its device (and defining its configuration structs) on !CONFIG_IOMMU_API. This is generally nice to have, but more importantly, it fixes: arch/arm/plat-omap/include/plat/iommu.h: In function 'dev_to_omap_iommu': arch/arm/plat-omap/include/plat/iommu.h:135: error: 'struct dev_archdata' has no member named 'iommu' arch/arm/mach-omap2/devices.c: In function 'omap3_init_camera': arch/arm/mach-omap2/devices.c:222: error: 'struct dev_archdata' has no member named 'iommu' make[1]: *** [arch/arm/mach-omap2/devices.o] Error 1 make: *** [arch/arm/mach-omap2] Error 2 Which happens because while setting up the omap3isp device we try to access the (now nonexistent) iommu member of dev_archdata. Compile tested with omap2plus_defconfig on today's: commit e343a895a9f342f239c5e3c5ffc6c0b1707e6244 Merge: 06792c4 193a667 Author: Linus Torvalds <torvalds@linux-foundation.org> Date: Tue Jan 10 18:04:27 2012 -0800 Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost Reported-by: Govindraj Raja <govindraj.raja@ti.com> Reported-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Joerg Roedel <Joerg.Roedel@amd.com> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-01-16[SCSI] libfc: remove redundant timer init for fcpYi Zou
The fcp timer is already initialized when it gets allocated. Signed-off-by: Yi Zou <yi.zou@intel.com> Tested-by: Ross Brattain <ross.b.brattain@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-01-16[SCSI] fcoe: Move fcoe_debug_logging from fcoe.h to fcoe.cBart Van Assche
Move the definition of the global variable fcoe_debug_logging from fcoe.h to fcoe.c. Avoid that sparse complains about missing declarations for local functions or variables by declaring these static. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Yi Zou <yi.zou@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-01-16[SCSI] libfc: Declare local functions staticBart Van Assche
Avoid that sparse complains about missing declarations for local functions by declaring these static or by adding an #include directive. Add the __percpu annotation where it is missing. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Yi Zou <yi.zou@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-01-16[SCSI] fcoe: fix regression on offload em matching function for initiator/targetYi Zou
This is a regression introduced by commit 1ff9918b625457ce20d450d00f9ed0a12ba191b7 The else statement here is breaking the initiator logic of allocating xid from the offloaded em xid pool for READ I/O only to use DDP, as shown by the snippet of trace below, where the WRITE is using xid 0x5 from the offloaded em xid pool: Protocol VID Len S_ID D_ID OX_ID RX_ID Summary .. *FCP 228 96 0b.08.01 -> 01.0f.00 0x0005 0xffff SCSI: Write(10) LUN: 0x00 FCP 228 76 01.0f.00 -> 0b.08.01 0x0005 0x828d XFER_RDY ... The bug is in the else statement, for both initiator and target, the new command will have FC frame header bit 23 (FC_FC_EX_CTX) cleared as it was originated from the initiator. Also, this is assuming the frame header is already filled up, which is only true for target since for initiator, this is a new frame and oem_match gets called when em tries get xid for this i/o before it is filled up and sent out. The fix is to check if there is a fc_fcp_pkt associated w/ this frame from fr_fsp(fp), since fr_fsp(fp) is NULL for tcm_fc target and non-I/O frame in initiator. This should also return true for target only if it is an FC_RCTL_DD_UNSOL_CMD and rx_id is not allocated. Signed-off-by: Yi Zou <yi.zou@intel.com> Tested-by: Ross Brattain <ross.b.brattain@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-01-16[SCSI] qla4xxx: Update driver version to 5.02.00-k12Vikas Chaudhary
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-01-16[SCSI] qla4xxx: Cleanup modinfo displayKaren Higgins
Beautify modinfo display. Display correct info for ql4xextended_error_logging [jejb: fixup checkpatch warning] Signed-off-by: Karen Higgins <karen.higgins@qlogic.com> Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-01-16[SCSI] qla4xxx: Update licenseVikas Chaudhary
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-01-16[SCSI] qla4xxx: Clear the RISC interrupt bit during FW initSarang Radke
This patch fix kernel panic during kdump. Signed-off-by: Sarang Radke <sarang.radke@qlogic.com> Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-01-16[SCSI] qla4xxx: Added error logging for firmware abortNilesh Javali
Added debug print with error code in case of firmware error. Signed-off-by: Nilesh Javali <nilesh.javali@qlogic.com> Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-01-16[SCSI] qla4xxx: Disable generating pause frames in case of FW hungGiridhar Malavali
In case of FW hung ISP82xx generates continuous pause frames which causes switch to disable port. Added fix to disable generating pause frames in case of FW hung Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com> Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-01-16[SCSI] qla4xxx: Temperature monitoring for ISP82XX core.Mike Hernandez
During watchdog, need to monitor temperature of ISP82XX core and set device state to FAILED when temperature reaches "Panic" level. Signed-off-by: Mike Hernandez <michael.hernandez@qlogic.com> Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-01-16[SCSI] megaraid: fix sparse warningsadam radford
There's a zero day mistake in the megaraid driver in that the code that obtains the version number does a >> 8 on a char quantity. This >>8 causes a sparse warning because it always produces zero. Al Viro suggested these shifts should be >> 4 thus treating the firmware version as a BCD quantity. However, in the interests of safety we've elected to replace the >> 8 quantities with an explicit zero, thus quieting the sparse warning while preserving the same (albeit incorrect) version number as had previously been seen. Signed-off-by: Adam Radford <aradford@gmail.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-01-16[SCSI] sg: convert to kstrtoul_from_user()Stephen Boyd
Instead of open coding this function use kstrtoul_from_user() directly. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Acked-by: Douglas Gilbert <dgilbert@interlog.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-01-16[SCSI] don't change sdev starvation list order without request dispatchedShaohua Li
The sdev is deleted from starved list and then try to dispatch from this device. It's quite possible the sdev can't eventually dispatch a request, then the sdev will be in starved list tail. This isn't fair. There are two cases here: 1. unplug path. scsi_request_fn() calls to scsi_target_queue_ready(), then the dev is removed from starved list, but quite possible host queue isn't ready, the dev is moved to starved list without dispatching any request. 2. scsi_run_queue path. It deletes the dev from starved list first (both global and local starved lists), then handles the dev. Then we could have the same process like case 1. This patch fixes the first case. Case 2 isn't fixed, because there is a rare case scsi_run_queue finds host isn't busy but scsi_request_fn finds host is busy (other CPU is faster to get host queue depth). Not deleting the dev from starved list in scsi_run_queue will keep scsi_run_queue looping (though this is very rare case, because host will become busy). Fortunately fixing case 1 already gives big improvement for starvation in my test. In a 12 disk JBOD setup, running file creation under EXT4, this gives 12% more throughput. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>