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[2/7] aacraid: IOCTL pass-through command fix

Message ID 13272BDD18A5F44CB23C497D29A37252A648A00E@BBYEXM01.pmc-sierra.internal (mailing list archive)
State New, archived
Headers show

Commit Message

Murthy Bhat March 17, 2015, 7:06 a.m. UTC 
Reviewed-by: Murthy Bhat <Murthy.Bhat@pmcs.com>

-----Original Message-----
From: Mahesh Rajashekhara 
Sent: Wednesday, March 04, 2015 2:08 PM
To: JBottomley@Parallels.com; linux-scsi@vger.kernel.org
Cc: aacraid@pmc-sierra.com; Harry Yang; Achim Leubner; Rajinikanth Pandurangan; Rich Bono; Mahesh Rajashekhara
Subject: [PATCH 2/7] aacraid: IOCTL pass-through command fix

The Linux aacriad driver fails to detect the case of SG list count=0 on IOCTL pass-through command and cause intermittent fault.
The result is the Linux aacriad driver send down IOCTL pass-through command with one not initialized SG list to firmware when receiving SG list count =0 on pass-through command.

Signed-off-by: Mahesh Rajashekhara <Mahesh.Rajashekhara@pmcs.com>
---
 drivers/scsi/aacraid/commctrl.c |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c
index fbcd48d..54195a1 100644
--- a/drivers/scsi/aacraid/commctrl.c
+++ b/drivers/scsi/aacraid/commctrl.c
@@ -689,7 +689,10 @@  static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 			kfree (usg);
 		}
 		srbcmd->count = cpu_to_le32(byte_count);
-		psg->count = cpu_to_le32(sg_indx+1);
+		if (user_srbcmd->sg.count)
+			psg->count = cpu_to_le32(sg_indx+1);
+		else
+			psg->count = 0;
 		status = aac_fib_send(ScsiPortCommand64, srbfib, actual_fibsize, FsaNormal, 1, 1,NULL,NULL);
 	} else {
 		struct user_sgmap* upsg = &user_srbcmd->sg;
@@ -775,7 +778,10 @@  static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 			}
 		}
 		srbcmd->count = cpu_to_le32(byte_count);
-		psg->count = cpu_to_le32(sg_indx+1);
+		if (user_srbcmd->sg.count)
+			psg->count = cpu_to_le32(sg_indx+1);
+		else
+			psg->count = 0;
 		status = aac_fib_send(ScsiPortCommand, srbfib, actual_fibsize, FsaNormal, 1, 1, NULL, NULL);
 	}
 	if (status == -ERESTARTSYS) {