kernel/linux.git/drivers/misc/mei, branch v4.8.16

mei: bus: fix received data size check in NFC fixup

2016-11-18T09:51:50+00:00

commit 582ab27a063a506ccb55fc48afcc325342a2deba upstream. NFC version reply size checked against only header size, not against full message size. That may lead potentially to uninitialized memory access in version data. That leads to warnings when version data is accessed: drivers/misc/mei/bus-fixup.c: warning: '*((void *)&ver+11)' may be used uninitialized in this function [-Wuninitialized]: => 212:2 Reported in Build regressions/improvements in v4.9-rc3 https://lkml.org/lkml/2016/10/30/57 Fixes: 59fcd7c63abf (mei: nfc: Initial nfc implementation) Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: txe: don't clean an unprocessed interrupt cause.

2016-11-10T15:38:49+00:00

commit 43605e293eb13c07acb546c14f407a271837af17 upstream. SEC registers are not accessible when the TXE device is in low power state, hence the SEC interrupt cannot be processed if device is not awake. In some rare cases entrance to low power state (aliveness off) and input ready bits can be signaled at the same time, resulting in communication stall as input ready won't be signaled again after waking up. To resolve this IPC_HHIER_SEC bit in HHISR_REG should not be cleaned if the interrupt is not processed. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: me: add kaby point device ids

2016-10-28T07:45:18+00:00

commit ac182e8abc6f93c1c4cc12f042af64c9d7be0d1e upstream. Add device ids for Intel Kabypoint PCH (Kabylake) Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: fix return value on disconnection

2016-10-28T07:45:18+00:00

commit 2d4d5481e2d6f93b25fcfb13a9f20bbfbf54266a upstream. Correct errno on client disconnection is -ENODEV not -EBUSY Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin Signed-off-by: Greg Kroah-Hartman

mei: amthif: fix deadlock in initialization during a reset

2016-10-22T10:40:22+00:00

commit e728ae271f4cf71218ec06a6daf61b79466cb466 upstream. The device lock was unnecessary obtained in bus rescan work before the amthif client search. That causes incorrect lock ordering and task hang: ... [88004.613213] INFO: task kworker/1:14:21832 blocked for more than 120 seconds. ... [88004.645934] Workqueue: events mei_cl_bus_rescan_work ... The correct lock order is cl_bus_lock device_lock me_clients_rwsem Move device_lock into amthif init function that called after me_clients_rwsem is released. This fixes regression introduced by commit: commit 025fb792bac3 ("mei: split amthif client init from end of clients enumeration") Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman Signed-off-by: Greg Kroah-Hartman

mei: me: disable driver on SPT SPS firmware

2016-08-30T12:34:04+00:00

Sunrise Point PCH with SPS Firmware doesn't expose working MEI interface, we need to quirk it out. The SPS Firmware is identifiable only on the first PCI function of the device. Cc: #4.6+ Tested-by: Sujith Pandel Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

Merge 4.7-rc4 into char-misc-next

2016-06-25T14:29:44+00:00

We want those fixes in here to help with merge issues. Signed-off-by: Greg Kroah-Hartman

mei: don't use wake_up_interruptible for wr_ctrl

2016-06-11T05:14:24+00:00

wr_ctrl waiters are none interruptible, so should be waken up with call to wake_up and not to wake_up_interruptible. This fixes commit: 7ff4bdd ("mei: fix waiting for wr_ctrl for corner cases.") Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: drop wr_msg from the mei_dev structure

2016-06-11T05:09:41+00:00

The control messages are usually small, around 8 bytes, and can be allocated on the stack. Using on stack allocation allows us to drop 'wr_msg' a rather large buffer reserved in the mei_dev structure and relax contention of this device global buffer. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: bus: call mei_cl_read_start under device lock

2016-05-03T22:07:35+00:00

Ensure that mei_cl_read_start is called under the device lock also in the bus layer. The function updates global ctrl_wr_list which should be locked. Cc: #4.4+ Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman