From f3a9c4d76a955e331e88992cd3b1e1498c231d52 Mon Sep 17 00:00:00 2001 From: Brian King Date: Thu, 17 Jun 2010 13:56:03 -0500 Subject: [SCSI] ibmvscsi: Fix possible request_limit issue If we encounter an error when sending a management datagram (i.e. non SCSI command, such as virtual adapter initialization command), we end up incrementing the request_limit, even though we don't decrement it for these commands. Fix this up by doing this increment in the error path for SRP commands only. Signed-off-by: Brian King Signed-off-by: James Bottomley --- drivers/scsi/ibmvscsi/ibmvscsi.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c index 83b5a174164c..4f906efb1519 100644 --- a/drivers/scsi/ibmvscsi/ibmvscsi.c +++ b/drivers/scsi/ibmvscsi/ibmvscsi.c @@ -548,6 +548,7 @@ static int ibmvscsi_send_srp_event(struct srp_event_struct *evt_struct, u64 *crq_as_u64 = (u64 *) &evt_struct->crq; int request_status = 0; int rc; + int srp_req = 0; /* If we have exhausted our request limit, just fail this request, * unless it is for a reset or abort. @@ -556,6 +557,7 @@ static int ibmvscsi_send_srp_event(struct srp_event_struct *evt_struct, * can handle more requests (can_queue) when we actually can't */ if (evt_struct->crq.format == VIOSRP_SRP_FORMAT) { + srp_req = 1; request_status = atomic_dec_if_positive(&hostdata->request_limit); /* If request limit was -1 when we started, it is now even @@ -630,7 +632,8 @@ static int ibmvscsi_send_srp_event(struct srp_event_struct *evt_struct, goto send_busy; } dev_err(hostdata->dev, "send error %d\n", rc); - atomic_inc(&hostdata->request_limit); + if (srp_req) + atomic_inc(&hostdata->request_limit); goto send_error; } @@ -640,7 +643,7 @@ static int ibmvscsi_send_srp_event(struct srp_event_struct *evt_struct, unmap_cmd_data(&evt_struct->iu.srp.cmd, evt_struct, hostdata->dev); free_event_struct(&hostdata->pool, evt_struct); - if (request_status != -1) + if (srp_req && request_status != -1) atomic_inc(&hostdata->request_limit); return SCSI_MLQUEUE_HOST_BUSY; -- cgit v1.2.3