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authorAlan Cox <alan@lxorguk.ukuu.org.uk>2006-10-03 01:14:33 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-03 08:04:08 -0700
commit913759ac90a727b86da72efcfb70931f497d1cb7 (patch)
treef95e10f757e93eca8eacbf03985c09994ec4ef46 /drivers/ide/ide-iops.c
parentb86cc29dc42203588264d917e88134bdd500b0d7 (diff)
[PATCH] ide: Fix crash on repeated reset
Michal Miroslaw reported a problem (bugzilla #7023) where a user initiated reset while the IDE layer was already resetting the channel caused a crash, and provided a rough fix. This is a slightly cleaner version of the fix which tracks the reset state and blocks further reset requests while a reset is in progress. Note this is not a security issue - random end users can't access the ioctl in question anyway. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Michal Miroslaw <mirq-linux@rere.qmqm.pl> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/ide/ide-iops.c')
-rw-r--r--drivers/ide/ide-iops.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c
index 77703acaec1..badde633177 100644
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -998,6 +998,7 @@ static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive)
}
/* done polling */
hwgroup->polling = 0;
+ hwgroup->resetting = 0;
return ide_stopped;
}
@@ -1057,6 +1058,7 @@ static ide_startstop_t reset_pollfunc (ide_drive_t *drive)
}
}
hwgroup->polling = 0; /* done polling */
+ hwgroup->resetting = 0; /* done reset attempt */
return ide_stopped;
}
@@ -1143,6 +1145,7 @@ static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
/* For an ATAPI device, first try an ATAPI SRST. */
if (drive->media != ide_disk && !do_not_try_atapi) {
+ hwgroup->resetting = 1;
pre_reset(drive);
SELECT_DRIVE(drive);
udelay (20);
@@ -1168,6 +1171,7 @@ static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
return ide_stopped;
}
+ hwgroup->resetting = 1;
/*
* Note that we also set nIEN while resetting the device,
* to mask unwanted interrupts from the interface during the reset.