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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-12-29 20:27:31 +0100
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-12-29 20:27:31 +0100
commit2a2ca6a96194c4744a2adeefbc09ce881f3c5abe (patch)
tree50b43d823d4a589fbfb8f8751278d6101cd3ecf3 /drivers/ide/umc8672.c
parent6ea52226ca131a99bb619bd56fbeee566ea5a966 (diff)
downloadop-kernel-dev-2a2ca6a96194c4744a2adeefbc09ce881f3c5abe.zip
op-kernel-dev-2a2ca6a96194c4744a2adeefbc09ce881f3c5abe.tar.gz
ide: replace the global ide_lock spinlock by per-hwgroup spinlocks (v2)
Now that (almost) all host drivers have been fixed not to abuse ide_lock and core code usage of ide_lock has been sanitized we may safely replace ide_lock by per-hwgroup locks. This patch is partially based on earlier patch from Ravikiran G Thirumalai. While at it: - don't use deprecated HWIF() and HWGROUP() macros - update locking documentation in ide.h v2: Add missing spin_lock_init(&hwgroup->lock). (Noticed by Elias Oltmanns) Cc: Vaibhav V. Nivargi <vaibhav.nivargi@gmail.com> Cc: Alok N. Kataria <alokk@calsoftinc.com> Cc: Shai Fultheim <shai@scalex86.org> Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org> Cc: Elias Oltmanns <eo@nebensachen.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/umc8672.c')
-rw-r--r--drivers/ide/umc8672.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/ide/umc8672.c b/drivers/ide/umc8672.c
index 1da076e..e29978c 100644
--- a/drivers/ide/umc8672.c
+++ b/drivers/ide/umc8672.c
@@ -107,18 +107,21 @@ static void umc_set_speeds(u8 speeds[])
static void umc_set_pio_mode(ide_drive_t *drive, const u8 pio)
{
ide_hwif_t *hwif = drive->hwif;
- unsigned long flags;
+ ide_hwgroup_t *mate_hwgroup = hwif->mate ? hwif->mate->hwgroup : NULL;
+ unsigned long uninitialized_var(flags);
printk("%s: setting umc8672 to PIO mode%d (speed %d)\n",
drive->name, pio, pio_to_umc[pio]);
- spin_lock_irqsave(&ide_lock, flags);
- if (hwif->mate && hwif->mate->hwgroup->handler) {
+ if (mate_hwgroup)
+ spin_lock_irqsave(&mate_hwgroup->lock, flags);
+ if (mate_hwgroup && mate_hwgroup->handler) {
printk(KERN_ERR "umc8672: other interface is busy: exiting tune_umc()\n");
} else {
current_speeds[drive->name[2] - 'a'] = pio_to_umc[pio];
umc_set_speeds(current_speeds);
}
- spin_unlock_irqrestore(&ide_lock, flags);
+ if (mate_hwgroup)
+ spin_unlock_irqrestore(&mate_hwgroup->lock, flags);
}
static const struct ide_port_ops umc8672_port_ops = {
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