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s390/cio: fix return code after missing interrupt 

[ Upstream commit 770b55c995 ]

When a timeout occurs for users of ccw_device_start_timeout
we will stop the IO and call the drivers int handler with
the irb pointer set to ERR_PTR(-ETIMEDOUT). Sometimes
however we'd set the irb pointer to ERR_PTR(-EIO) which is
not intended. Just set the correct value in all codepaths.

Reported-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Sebastian Ott 2018-02-07 13:18:19 +01:00 committed by Greg Kroah-Hartman
parent 5df337455c
commit c5b1b2e218
2 changed files with 5 additions and 2 deletions
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6
drivers/s390/cio/device_fsm.c
View File

@ -796,6 +796,7 @@ ccw_device_online_timeout(struct ccw_device *cdev, enum dev_event dev_event)
ccw_device_set_timeout(cdev, 0);
cdev->private->iretry = 255;
cdev->private->async_kill_io_rc = -ETIMEDOUT;
ret = ccw_device_cancel_halt_clear(cdev);
if (ret == -EBUSY) {
ccw_device_set_timeout(cdev, 3*HZ);
@ -872,7 +873,7 @@ ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event)
/* OK, i/o is dead now. Call interrupt handler. */
if (cdev->handler)
cdev->handler(cdev, cdev->private->intparm,
ERR_PTR(-EIO));
ERR_PTR(cdev->private->async_kill_io_rc));
}
static void
@ -889,7 +890,7 @@ ccw_device_killing_timeout(struct ccw_device *cdev, enum dev_event dev_event)
ccw_device_online_verify(cdev, 0);
if (cdev->handler)
cdev->handler(cdev, cdev->private->intparm,
ERR_PTR(-EIO));
ERR_PTR(cdev->private->async_kill_io_rc));
}
void ccw_device_kill_io(struct ccw_device *cdev)
@ -897,6 +898,7 @@ void ccw_device_kill_io(struct ccw_device *cdev)
int ret;
cdev->private->iretry = 255;
cdev->private->async_kill_io_rc = -EIO;
ret = ccw_device_cancel_halt_clear(cdev);
if (ret == -EBUSY) {
ccw_device_set_timeout(cdev, 3*HZ);

1
drivers/s390/cio/io_sch.h
View File

@ -157,6 +157,7 @@ struct ccw_device_private {
unsigned long intparm; /* user interruption parameter */
struct qdio_irq *qdio_data;
struct irb irb; /* device status */
int async_kill_io_rc;
struct senseid senseid; /* SenseID info */
struct pgid pgid[8]; /* path group IDs per chpid*/
struct ccw1 iccws[2]; /* ccws for SNID/SID/SPGID commands */