kernel/linux.git/drivers/misc/mei/main.c, branch linux-4.4.y

mei: remove dev_err message on an unsupported ioctl

2018-04-08T09:52:00+00:00

commit bb0829a741792b56c908d7745bc0b2b540293bcc upstream. Currently the driver spams the kernel log on unsupported ioctls which is unnecessary as the ioctl returns -ENOIOCTLCMD to indicate this anyway. I suspect this was originally for debugging purposes but it really is not required so remove it. Signed-off-by: Colin Ian King Cc: stable Signed-off-by: Greg Kroah-Hartman

mei: fix return value on disconnection

2016-12-02T08:09:02+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: validate request value in client notify request ioctl

2016-03-03T23:07:13+00:00

commit 7326fffb712f09a315bc73cc1ee63843f59b8bd4 upstream. This patch address a possible security issue: The request field in client notify request ioctl comes from user space as u32 and is downcasted to u8 with out validation. Check request field to have approved values MEI_HBM_NOTIFICATION_STAR/STOP Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: fix fasync return value on error

2016-03-03T23:07:13+00:00

commit ed6dc538e5a36a331b6256d54f435c80f6715460 upstream. fasync should return a negative value on error and not poll mask POLLERR. Cc: Al Viro Reported-by: Al Viro Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: implement fasync for event notification

2015-08-04T00:30:00+00:00

A process can be informed about client notification also via SIGIO with POLL_PRI event. Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: support polling for event notification

2015-08-04T00:30:00+00:00

Polling on priority events is translated on waiting for event notification. One need to enable notification prior for calling select or poll system call otherwise process will not wait. Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin Signed-off-by: Greg Kroah-Hartman

mei: add async event notification ioctls

2015-08-04T00:30:00+00:00

Add ioctl IOCTL_MEI_NOTIFY_SET for enabling and disabling async event notification. Add ioctl IOCTL_MEI_NOTIFY_GET for receiving and acking an event notification. Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin Signed-off-by: Greg Kroah-Hartman

mei: prevent unloading mei hw modules while the device is opened.

2015-07-23T04:31:05+00:00

chrdev_open() increases reference counter on cdev->owner. Instead of assigning the owner to mei subsystem, the owner has to be set to the underlaying HW module (mei_me or mei_txe), so once the device is opened the HW module cannot be unloaded. Cc: #3.17+ Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin Signed-off-by: Greg Kroah-Hartman

mei: debug prints with client info in read

2015-05-24T18:13:49+00:00

Add client info to debug prints in the read function to ease on debugging efforts. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: connection to fixed address clients from user-space

2015-05-24T18:13:48+00:00

This should be used for debug only. The feaure is gated by "allow_fixed_address" control exposed in debugfs. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman