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[SCSI] libfc: Don't assume response request present.

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Fix NULL pointer dereference crash occurs in fc_lport_bsg_request()
for bsg requests that do not contain a response request.
Specifically, FC_BSG_HST_ADD_RPORT and FC_BSG_HST_DEL_RPORT bsg
requests are not guaranteed to include a response request.

Signed-off-by: Hugh Daschbach <hdasch@broadcom.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Hugh Daschbach 2010-02-16 12:15:28 -08:00 committed by James Bottomley
parent 5b7a381e55
commit 696c1cff52
1 changed files with 2 additions and 1 deletions
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3
drivers/scsi/libfc/fc_lport.c
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@ -1800,7 +1800,8 @@ int fc_lport_bsg_request(struct fc_bsg_job *job)
u32 did; u32 did;
job->reply->reply_payload_rcv_len = 0; job->reply->reply_payload_rcv_len = 0;
rsp->resid_len = job->reply_payload.payload_len; if (rsp)
rsp->resid_len = job->reply_payload.payload_len;
mutex_lock(&lport->lp_mutex); mutex_lock(&lport->lp_mutex);