s390/cio: fix return code after missing interrupt

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>

diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c
index 1319122..384f085 100644 (file)
--- a/drivers/s390/cio/device_fsm.c
+++ b/drivers/s390/cio/device_fsm.c
@@ -795,6 +795,7 @@ 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);
@@ -871,7 +872,7 @@ 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
@@ -888,7 +889,7 @@ 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)
@@ -896,6 +897,7 @@ 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);

diff --git a/drivers/s390/cio/io_sch.h b/drivers/s390/cio/io_sch.h
index af571d8..90e4e3a 100644 (file)
--- a/drivers/s390/cio/io_sch.h
+++ b/drivers/s390/cio/io_sch.h
@@ -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 */