On 11/26/12 05:44, David Dillow wrote:
> From: Bart Van Assche <bvanass...@acm.org>
>
> Some SCSI upper layer drivers, e.g. sd, issue SCSI commands from
> inside scsi_remove_host() (see also the sd_shutdown() call in
> sd_remove()). Make sure that these commands have a chance to reach
> the SCSI device.
>
> Signed-off-by: Bart Van Assche <bvanass...@acm.org>
> [ adapted to new state tracking ]
> Signed-off-by: David Dillow <dillo...@ornl.gov>
> ---
> drivers/infiniband/ulp/srp/ib_srp.c | 11 ++++++-----
> 1 files changed, 6 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/infiniband/ulp/srp/ib_srp.c
> b/drivers/infiniband/ulp/srp/ib_srp.c
> index 2951e1c..f7d7e6a 100644
> --- a/drivers/infiniband/ulp/srp/ib_srp.c
> +++ b/drivers/infiniband/ulp/srp/ib_srp.c
> @@ -1328,12 +1328,13 @@ static int srp_queuecommand(struct Scsi_Host *shost,
> struct scsi_cmnd *scmnd)
> int len;
>
> if (unlikely(target->state)) {
> - if (!srp_is_removed(target))
> + /*
> + * Only requeue commands if we cannot send them to the target.
> + * We'll let commands through during shutdown so that caches
> + * get flushed, etc.
> + */
> + if (srp_is_disconnected(target) || srp_in_error(target))
> goto err;
> -
> - scmnd->result = DID_BAD_TARGET << 16;
> - scmnd->scsi_done(scmnd);
> - return 0;
> }
>
> spin_lock_irqsave(&target->lock, flags);
Hi Dave,
After I posted the patch on which the above patch has been based I
realized that it can be simplified. Since the patch called "Eliminate
state SRP_TARGET_CONNECTING" blocks the SCSI host as long as the RDMA
RC connection is being reconnected srp_queuecommand() won't be invoked
during the "disconnected" or "error" state. How about adding the patch
below just after the patch that eliminates the state
SRP_TARGET_CONNECTING ?
Bart.
[PATCH] ib_srp: Keep processing commands during host removal
Some SCSI upper layer drivers, e.g. sd, issue SCSI commands from
inside scsi_remove_host(). See also the sd_shutdown() call in
sd_remove(). Make sure that these commands have a chance to reach
the SCSI device.
Signed-off-by: Bart Van Assche <bvanass...@acm.org>
---
drivers/infiniband/ulp/srp/ib_srp.c | 7 -------
1 file changed, 7 deletions(-)
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c
b/drivers/infiniband/ulp/srp/ib_srp.c
index 39723e7..03b9fa0 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -1324,13 +1324,6 @@ static int srp_queuecommand(struct Scsi_Host *shost,
struct scsi_cmnd *scmnd)
unsigned long flags;
int len;
- if (target->state == SRP_TARGET_DEAD ||
- target->state == SRP_TARGET_REMOVED) {
- scmnd->result = DID_BAD_TARGET << 16;
- scmnd->scsi_done(scmnd);
- return 0;
- }
-
spin_lock_irqsave(&target->lock, flags);
iu = __srp_get_tx_iu(target, SRP_IU_CMD);
if (!iu)
--
1.7.10.4
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