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path: root/drivers/char
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2018-05-09ipmi: Remove the proc interfaceCorey Minyard
It has been deprecated long enough, get rid of it. Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-05-09tpm/st33zp24: Fix spelling mistake in macro ST33ZP24_TISREGISTER_UKNOWNColin Ian King
Fix spelling mistake, rename ST33ZP24_TISREGISTER_UKNOWN to ST33ZP24_TISREGISTER_UNKNOWN Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
2018-05-09tpm: Move eventlog declarations to its own headerThiebaud Weksteen
Reduce the size of tpm.h by moving eventlog declarations to a separate header. Signed-off-by: Thiebaud Weksteen <tweek@google.com> Suggested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
2018-05-09tpm: Move shared eventlog functions to common.cThiebaud Weksteen
Functions and structures specific to TPM1 are renamed from tpm* to tpm1*. Signed-off-by: Thiebaud Weksteen <tweek@google.com> Suggested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
2018-05-09tpm: Move eventlog files to a subdirectoryThiebaud Weksteen
Signed-off-by: Thiebaud Weksteen <tweek@google.com> Suggested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
2018-05-09tpm: Add explicit endianness castThiebaud Weksteen
Signed-off-by: Thiebaud Weksteen <tweek@google.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
2018-05-09tpm: st33zp24: remove redundant null check on chipColin Ian King
Currently chip is being dereferenced by the call to dev_get_drvdata before it is being null checked, however, chip can never be null, so this check is misleading and redundant. Remove it. Detected by CoverityScan, CID#1357806 ("Dereference before null check") Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Jarkko Sakkinen <jarkkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkkko.sakkinen@linux.intel.com>
2018-05-09tpm: move the delay_msec increment after sleep in tpm_transmit()Nayna Jain
Commit e2fb992d82c6 ("tpm: add retry logic") introduced a new loop to handle the TPM2_RC_RETRY error. The loop retries the command after sleeping for the specified time, which is incremented exponentially in every iteration. Unfortunately, the loop doubles the time before sleeping, causing the initial sleep to be doubled. This patch fixes the initial sleep time. Fixes: commit e2fb992d82c6 ("tpm: add retry logic") Signed-off-by: Nayna Jain <nayna@linux.vnet.ibm.com> Reviewed-by: Mimi Zohar <zohar@linux.vnet.ibm.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
2018-05-05hwrng: stm32 - fix pm_suspend issuelionel.debieve@st.com
When suspend is called after pm_runtime_suspend, same callback is used and access to rng register is freezing system. By calling the pm_runtime_force_suspend, it first checks that runtime has been already done. Signed-off-by: Lionel Debieve <lionel.debieve@st.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-05-05hwrng: stm32 - define default state for rng driverlionel.debieve@st.com
Define default state for stm32_rng driver. It will be default selected with multi_v7_defconfig Signed-off-by: Lionel Debieve <lionel.debieve@st.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-04-30Merge 4.17-rc3 into char-misc-nextGreg Kroah-Hartman
We want the fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-04-26Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds
Pull virtio fixups from Michael Tsirkin: - Latest header update will break QEMU (if it's rebuilt with the new header) - and it seems that the code there is so fragile that any change in this header will break it. Add a better interface so users do not need to change their code every time that header changes. - Fix virtio console for spec compliance. * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: virtio_console: reset on out of memory virtio_console: move removal code virtio_console: drop custom control queue cleanup virtio_console: free buffers after reset virtio: add ability to iterate over vqs virtio_console: don't tie bufs to a vq virtio_balloon: add array of stat names
2018-04-26Merge tag 'random_for_linus_stable' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random Pull /dev/random fixes from Ted Ts'o: "Fix a regression on NUMA kernels and suppress excess unseeded entropy pool warnings" * tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random: random: rate limit unseeded randomness warnings random: fix possible sleeping allocation from irq context
2018-04-25virtio_console: reset on out of memoryMichael S. Tsirkin
When out of memory and we can't add ctrl vq buffers, probe fails. Unfortunately the error handling is out of spec: it calls del_vqs without bothering to reset the device first. To fix, call the full cleanup function in this case. Cc: stable@vger.kernel.org Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-04-25virtio_console: move removal codeMichael S. Tsirkin
Will make it reusable for error handling. Cc: stable@vger.kernel.org Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-04-25virtio_console: drop custom control queue cleanupMichael S. Tsirkin
We now cleanup all VQs on device removal - no need to handle the control VQ specially. Cc: stable@vger.kernel.org Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-04-25virtio_console: free buffers after resetMichael S. Tsirkin
Console driver is out of spec. The spec says: A driver MUST NOT decrement the available idx on a live virtqueue (ie. there is no way to “unexpose” buffers). and it does exactly that by trying to detach unused buffers without doing a device reset first. Defer detaching the buffers until device unplug. Of course this means we might get an interrupt for a vq without an attached port now. Handle that by discarding the consumed buffer. Reported-by: Tiwei Bie <tiwei.bie@intel.com> Fixes: b3258ff1d6 ("virtio: Decrement avail idx on buffer detach") Cc: stable@vger.kernel.org Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-04-25virtio_console: don't tie bufs to a vqMichael S. Tsirkin
an allocated buffer doesn't need to be tied to a vq - only vq->vdev is ever used. Pass the function the just what it needs - the vdev. Cc: stable@vger.kernel.org Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-04-25random: rate limit unseeded randomness warningsTheodore Ts'o
On systems without sufficient boot randomness, no point spamming dmesg. Signed-off-by: Theodore Ts'o <tytso@mit.edu> Cc: stable@vger.kernel.org
2018-04-24random: fix possible sleeping allocation from irq contextTheodore Ts'o
We can do a sleeping allocation from an irq context when CONFIG_NUMA is enabled. Fix this by initializing the NUMA crng instances in a workqueue. Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Reported-by: syzbot+9de458f6a5e713ee8c1a@syzkaller.appspotmail.com Fixes: 8ef35c866f8862df ("random: set up the NUMA crng instances...") Cc: stable@vger.kernel.org Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2018-04-23char: mspec: change return type to vm_fault_tSouptick Joarder
Use new return type vm_fault_t for the fault handler in struct vm_operations_struct. For now, this is just documenting that the function returns a VM_FAULT value rather than an errno. Once all instances are converted, vm_fault_t will become a distinct type. This driver failed to handle any error returned by vm_insert_pfn. Use the new vmf_insert_pfn function to return the correct value. Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com> Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-04-21Merge tag 'random_for_linus_stable' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random Pull /dev/random fixes from Ted Ts'o: "Fix some bugs in the /dev/random driver which causes getrandom(2) to unblock earlier than designed. Thanks to Jann Horn from Google's Project Zero for pointing this out to me" * tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random: random: add new ioctl RNDRESEEDCRNG random: crng_reseed() should lock the crng instance that it is modifying random: set up the NUMA crng instances after the CRNG is fully initialized random: use a different mixing algorithm for add_device_randomness() random: fix crng_ready() test
2018-04-21hwrng: via - support new Centaur CPUdavidwang
New Centaur CPU(Family > 6) supprt Random Number Generator, but can't support MSR_VIA_RNG. Just like VIA Nano. Signed-off-by: David Wang <davidwang@zhaoxin.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-04-19ipmi_ssif: Fix uninitialized variable issueGustavo A. R. Silva
Currently, function ssif_remove returns _rv_, which is a variable that is never initialized. Fix this by removing variable _rv_ and return 0 instead. Addresses-Coverity-ID: 1467999 ("Uninitialized scalar variable") Fixes: 6a0d23ed338e ("ipmi: ipmi_unregister_smi() cannot fail, have it return void") Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi: add an NPCM7xx KCS BMC driverHaiyue Wang
This driver exposes the Keyboard Controller Style (KCS) interface on Novoton NPCM7xx SoCs as a character device. Such SOCs are commonly used as a BaseBoard Management Controller (BMC) on a server board, and KCS interface is commonly used to perform the in-band IPMI communication between the server and its BMC. Signed-off-by: Avi Fishman <avifishman70@gmail.com> Signed-off-by: Haiyue Wang <haiyue.wang@linux.intel.com> Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi_si: Clean up shutdown a bitCorey Minyard
Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi_si: Rename intf_num to si_numCorey Minyard
There is already an intf_num in the main IPMI device structure, use a different name in the ipmi_si code to avoid confusion. Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi: Remove smi->intf checksCorey Minyard
Due to changes in the way shutdown is done, it is no longer required to check that the interface is set. Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi_ssif: Get rid of unused intf_numCorey Minyard
Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi: ipmi_unregister_smi() cannot fail, have it return voidCorey Minyard
Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi_devintf: Add an error return on invalid ioctlsCorey Minyard
Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi_ssif: Remove usecount handlingCorey Minyard
Now that we can handle hot remove there is no need for usecounts for interfaces. Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi: Remove condition on interface shutdownCorey Minyard
Now that the interfaces have shutdown handlers, this no longer needs to be conditional. Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi_ssif: Convert over to a shutdown handlerCorey Minyard
Move the shutdown handling to a shutdown function called from the IPMI core code. That makes for a cleaner shutdown. Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi_si: Convert over to a shutdown handlerCorey Minyard
Move the shutdown handling to a shutdown function called from the IPMI core code. That makes for a cleaner shutdown. Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi: Rework locking and shutdown for hot removeCorey Minyard
To handle hot remove of interfaces, a lot of rework had to be done to the locking. Several things were switched over to srcu and shutdown for users and interfaces was added for cleaner shutdown. Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi: Fix some counter issuesCorey Minyard
Counters would not be pegged properly on some errors. Have deliver_response() return an error so the counters can be incremented properly. Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi: Change ipmi_smi_t to struct ipmi_smi *Corey Minyard
Get rid of this coding style violation in the user files. Include files will come later. Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi: Rename ipmi_user_t to struct ipmi_user *Corey Minyard
Get rid of that non-compliance in the user files. Include files will come later. Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi_devintf: Small lock reworkCorey Minyard
The mutex didn't really serve any useful purpose, from what I can tell, and it would just get in the way. So remove it. Removing that required a mutex around the default value setting and getting, so just use the receive mutex for that. Also pull the fasync stuff outside of the lock for adding the data to the queue, since it didn't need to be there. Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi: Clean up some style issues in the message handlerCorey Minyard
Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi: Break up i_ipmi_requestCorey Minyard
It was huge, and easily broken into pieces. Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi:devintf: Clean up some coding style issuesCorey Minyard
Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi: Clean up some debug codeCorey Minyard
Replace ifdefs in the code with a simple function. Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi:watchdog: Use the IPMI panic handler instead of the system oneCorey Minyard
This is a cleaner interface and the main IPMI panic handler does setup required by the watchdog handler. Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi: Add a panic handler for IPMI usersCorey Minyard
Users of the IPMI code had their own panic handlers, but the order was not necessarily right, the base IPMI code would need to handle the panic first, and the user had no way to know if the IPMI interface could run at panic time. Add a panic handler to the user interface, it is called if non-NULL and the interface the user is on is capable of panic handling. It also cleans up the panic log handling a bit to reuse the existing interface loop in the main panic handler. Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi:watchdog: Replace printk() with pr_xxx()Corey Minyard
And clean broken strings. Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi:watchdog: Rework locking and handlingCorey Minyard
Simplify things by creating one set of message handling data for setting the watchdog and doing a heartbeat. Rework the locking to avoid some (probably not very important) races and to avoid a fairly unlikely infinite recursion. Get rid of ipmi_ignore_heartbeat, it wasn't used, and use watchdog_user to tell if we have a working IPMI device below us. Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi: Add a maintenance mode for IPMB messagesCorey Minyard
If you send a command to another BMC that might take some extra time, increase the timeouts temporarily. Signed-off-by: Corey Minyard <cminyard@mvista.com>
2018-04-18ipmi: Add a way to tune some timeoutsCorey Minyard
By default the retry timeout is 1 second. Allow that to be modified, primarily for slow operations, like firmware writes. Also, the timeout was driven by a 1 second timer, so 1 second really meant between 0 and 1 second. Set the default to 2 seconds so it means between 1 and 2 seconds. Also allow the time the interface automatically stays in mainenance mode to be modified from it's default 30 seconds. Also consolidate some of the timeout and retry setup. Signed-off-by: Corey Minyard <cminyard@mvista.com> more
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