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platform_kernel-5.15
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mei: wake blocked write on link reset 

In case of link reset all blocked writes should be interrupted.
Note, that currently blocking write is used only through bus layer.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Usyskin 2016-02-07 23:35:34 +02:00 committed by Greg Kroah-Hartman
parent e8466b336a
commit 0faf6a3bba
1 changed files with 6 additions and 1 deletions
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7
drivers/misc/mei/client.c
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@ -1691,7 +1691,8 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking)
mutex_unlock(&dev->device_lock); mutex_unlock(&dev->device_lock);
rets = wait_event_interruptible(cl->tx_wait, rets = wait_event_interruptible(cl->tx_wait,
cl->writing_state == MEI_WRITE_COMPLETE); cl->writing_state == MEI_WRITE_COMPLETE ||
(!mei_cl_is_connected(cl)));
mutex_lock(&dev->device_lock); mutex_lock(&dev->device_lock);
/* wait_event_interruptible returns -ERESTARTSYS */ /* wait_event_interruptible returns -ERESTARTSYS */
if (rets) { if (rets) {
@ -1699,6 +1700,10 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking)
rets = -EINTR; rets = -EINTR;
goto err; goto err;
} }
if (cl->writing_state != MEI_WRITE_COMPLETE) {
rets = -EFAULT;
goto err;
}
} }
rets = size; rets = size;