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scsi: nsp32: fix logic bug in error handling 

gcc-8 points out a logic error that has existed since the start of the
git history:

drivers/scsi/nsp32.c: In function 'nsp32_selection_autoscsi':
drivers/scsi/nsp32.c:607:27: error: bitwise comparison always evaluates to false [-Werror=tautological-compare]
  if(((phase & BUSMON_BSY) == 1) || (phase & BUSMON_SEL) == 1) {
                           ^~

Presumably the author intended to check if one of two bits was set, so
that's what I'm changing the code to. This will obviously change the
behavior of the code, hopefully to do the right thing, but I have not
tested this or checked if the new "(phase & BUSMON_BSY) || (phase &
BUSMON_SEL)" condition should indeed be treated as a fatal error.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: GOTO Masanori <gotom@debian.or.jp>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Arnd Bergmann 2017-09-05 09:51:29 +02:00 committed by Martin K. Petersen
parent 3e35127565
commit 287f79653a
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/nsp32.c
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@ -604,7 +604,7 @@ static int nsp32_selection_autoscsi(struct scsi_cmnd *SCpnt)
* check bus line
*/
phase = nsp32_read1(base, SCSI_BUS_MONITOR);
if(((phase & BUSMON_BSY) == 1) || (phase & BUSMON_SEL) == 1) {
if ((phase & BUSMON_BSY) || (phase & BUSMON_SEL)) {
nsp32_msg(KERN_WARNING, "bus busy");
SCpnt->result = DID_BUS_BUSY << 16;
status = 1;