Mask 'ireason' variable so only the valid interrupt reason bits
will be reported on "drive appears confused" error.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
---
drivers/ide/ide-cd.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
Index: b/drivers/ide/ide-cd.c
===================================================================
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1440,7 +1440,7 @@ static ide_startstop_t cdrom_pc_intr (id
return ide_stopped;
/* Read the interrupt reason and the transfer length. */
- ireason = HWIF(drive)->INB(IDE_IREASON_REG);
+ ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3;
lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG);
highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG);
@@ -1481,7 +1481,7 @@ static ide_startstop_t cdrom_pc_intr (id
if (thislen > len) thislen = len;
/* The drive wants to be written to. */
- if ((ireason & 3) == 0) {
+ if (ireason == 0) {
if (!rq->data) {
blk_dump_rq_flags(rq, "cdrom_pc_intr, write");
goto confused;
@@ -1503,7 +1503,7 @@ static ide_startstop_t cdrom_pc_intr (id
}
/* Same drill for reading. */
- else if ((ireason & 3) == 2) {
+ else if (ireason == 2) {
if (!rq->data) {
blk_dump_rq_flags(rq, "cdrom_pc_intr, read");
goto confused;
-
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