From 644a9d764b4747af057b3db73ccba28a168b1f4f Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Wed, 12 Dec 2007 23:32:00 +0100 Subject: [PATCH] ide: fix ->io_32bit race in set_io_32bit() set_io_32bit() (ide_procset_t function) can race against running PIO transfers. Fix it by using ide_spin_wait_hwgroup(). Acked-by: Sergei Shtylyov Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/ide.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c index 85740ae5d689..54943da6e4e5 100644 --- a/drivers/ide/ide.c +++ b/drivers/ide/ide.c @@ -800,11 +800,17 @@ int set_io_32bit(ide_drive_t *drive, int arg) if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1)) return -EINVAL; + if (ide_spin_wait_hwgroup(drive)) + return -EBUSY; + drive->io_32bit = arg; #ifdef CONFIG_BLK_DEV_DTC2278 if (HWIF(drive)->chipset == ide_dtc2278) HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg; #endif /* CONFIG_BLK_DEV_DTC2278 */ + + spin_unlock_irq(&ide_lock); + return 0; }