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ide-cd: fix 'ireason' reporting in cdrom_pc_intr() 

Mask 'ireason' variable so only the valid interrupt reason bits
will be reported on "drive appears confused" error.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2007-12-24 15:23:44 +01:00
parent 5744a06134
commit 8606ab094c
1 changed files with 3 additions and 3 deletions
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6
drivers/ide/ide-cd.c
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@ -1446,7 +1446,7 @@ static ide_startstop_t cdrom_pc_intr (ide_drive_t *drive)
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);
@ -1487,7 +1487,7 @@ static ide_startstop_t cdrom_pc_intr (ide_drive_t *drive)
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;
@ -1509,7 +1509,7 @@ static ide_startstop_t cdrom_pc_intr (ide_drive_t *drive)
}
/* 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;