From: Tejun Heo Date: Sat, 18 Apr 2009 22:00:41 +0000 (+0900) Subject: ide-tape: remove back-to-back REQUEST_SENSE detection X-Git-Tag: firefly_0821_release~13979^2~149 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=0de57fb93b1daaeaecb658a98b3299ae460c02e9;p=firefly-linux-kernel-4.4.55.git ide-tape: remove back-to-back REQUEST_SENSE detection Impact: fix an oops which always triggers ide_tape_issue_pc() assumed drive->pc isn't NULL on invocation when checking for back-to-back request sense issues but drive->pc can be NULL and even when it's not NULL, it's not safe to dereference it once the previous command is complete because pc could have been freed or was on stack. Kill back-to-back REQUEST_SENSE detection. Signed-off-by: Tejun Heo --- diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c index cb942a9b580f..3a53e0834cf7 100644 --- a/drivers/ide/ide-tape.c +++ b/drivers/ide/ide-tape.c @@ -614,12 +614,6 @@ static ide_startstop_t ide_tape_issue_pc(ide_drive_t *drive, { idetape_tape_t *tape = drive->driver_data; - if (drive->pc->c[0] == REQUEST_SENSE && - pc->c[0] == REQUEST_SENSE) { - printk(KERN_ERR "ide-tape: possible ide-tape.c bug - " - "Two request sense in serial were issued\n"); - } - if (drive->failed_pc == NULL && pc->c[0] != REQUEST_SENSE) drive->failed_pc = pc;