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scsi: NCR5380: Initialize buffer for MSG IN and STATUS transfers

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[ Upstream commit 1c71065df2df693d208dd32758171c1dece66341 ]

Following an incomplete transfer in MSG IN phase, the driver would not
notice the problem and would make use of invalid data. Initialize 'tmp'
appropriately and bail out if no message was received. For STATUS phase,
preserve the existing status code unless a new value was transferred.

Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@linux-m68k.org>
Link: https://lore.kernel.org/r/52e02a8812ae1a2d810d7f9f7fd800c3ccc320c4.1723001788.git.fthain@linux-m68k.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Finn Thain
2024-08-07 13:36:28 +10:00
committed by Greg Kroah-Hartman
parent 03bba4aefe
commit 8cc0a1b768
1 changed files with 4 additions and 0 deletions
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4
drivers/scsi/NCR5380.c
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@@ -1807,8 +1807,11 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
return;
case PHASE_MSGIN:
len = 1;
tmp = 0xff;
data = &tmp;
NCR5380_transfer_pio(instance, &phase, &len, &data, 0);
if (tmp == 0xff)
break;
ncmd->message = tmp;
switch (tmp) {
@@ -1996,6 +1999,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
break;
case PHASE_STATIN:
len = 1;
tmp = ncmd->status;
data = &tmp;
NCR5380_transfer_pio(instance, &phase, &len, &data, 0);
ncmd->status = tmp;