summaryrefslogtreecommitdiff
path: root/drivers/ide/ide-lib.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/ide/ide-lib.c')
-rw-r--r--drivers/ide/ide-lib.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/ide/ide-lib.c b/drivers/ide/ide-lib.c
index df29868209f3..92a6c7bcf527 100644
--- a/drivers/ide/ide-lib.c
+++ b/drivers/ide/ide-lib.c
@@ -291,11 +291,11 @@ u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
struct hd_driveid* id = drive->id;
int overridden = 0;
- if (mode_wanted != 255) {
- pio_mode = mode_wanted;
- } else if (!drive->id) {
- pio_mode = 0;
- } else if ((pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
+ if (mode_wanted != 255)
+ return min_t(u8, mode_wanted, max_mode);
+
+ if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0 &&
+ (pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
} else {
pio_mode = id->tPIO;
@@ -324,7 +324,8 @@ u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
/*
* Conservative "downgrade" for all pre-ATA2 drives
*/
- if (pio_mode && pio_mode < 4) {
+ if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_DOWNGRADE) == 0 &&
+ pio_mode && pio_mode < 4) {
pio_mode--;
printk(KERN_INFO "%s: applying conservative "
"PIO \"downgrade\"\n", drive->name);