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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-10-11 23:54:00 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-10-11 23:54:00 +0200
commitf44ae58a273b1b051122784a159ad608b7205afd (patch)
treedf16a35742b10c7eff79cbb10294b92aa45e263a /drivers/ide/arm
parentca1997c1f35891b9e5d6c71ac587f97216886194 (diff)
icside: fix ->speedproc to return on unsupported modes (take 5)
* All other implementations of ->speedproc return zero on success and non-zero on failure. Currently it doesn't matter for icside host driver and isn't a bug per se since: - ide_set_xfer_rate() return value is ignored by all IDE core users - icside doesn't (yet!) use ide_tune_dma() in icside_dma_check() but sooner or later we will need to fix anyway - so lets do it now. * icside_set_speed() happily accepts unsupported transfer modes which results in drive->drive_data being set to the maximum value (480) and drive->current_speed being set to the unsupported transfer mode. Fix it. v2: * The initial version of the patch was broken because it didn't take into the account (the different from usual) return values of icside_set_speed() (Noticed by Russell). v3: * Remove no longer needed initialization/checking of cycle_time (Noticed by Sergei). * No need to set drive->drive_data if DMA is not going to be used (Noticed by Sergei). * Remove incorrect setting of drive->current_speed (Noticed by Sergei). * Move ide_config_drive_speed() at the end of icside_set_speed(). v4: * If DMA mode is not found in icside_dma_check() then just return "-1" and don't call icside_set_speed() (v3 got it wrong and "1" was returned instead). v5: * Return "-1"/"0" in icside_set_speed() instead of icside_dma_check() return value (just like it was before this patch). Cc: Russell King <rmk@arm.linux.org.uk> Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/arm')
-rw-r--r--drivers/ide/arm/icside.c21
1 files changed, 8 insertions, 13 deletions
diff --git a/drivers/ide/arm/icside.c b/drivers/ide/arm/icside.c
index 99a27f2dc03a..7912a471f10d 100644
--- a/drivers/ide/arm/icside.c
+++ b/drivers/ide/arm/icside.c
@@ -250,7 +250,7 @@ static void icside_build_sglist(ide_drive_t *drive, struct request *rq)
*/
static int icside_set_speed(ide_drive_t *drive, const u8 xfer_mode)
{
- int on = 0, cycle_time = 0, use_dma_info = 0;
+ int cycle_time, use_dma_info = 0;
switch (xfer_mode) {
case XFER_MW_DMA_2:
@@ -272,6 +272,8 @@ static int icside_set_speed(ide_drive_t *drive, const u8 xfer_mode)
case XFER_SW_DMA_0:
cycle_time = 480;
break;
+ default:
+ return 1;
}
/*
@@ -283,17 +285,10 @@ static int icside_set_speed(ide_drive_t *drive, const u8 xfer_mode)
drive->drive_data = cycle_time;
- if (cycle_time && ide_config_drive_speed(drive, xfer_mode) == 0)
- on = 1;
- else
- drive->drive_data = 480;
-
printk("%s: %s selected (peak %dMB/s)\n", drive->name,
ide_xfer_verbose(xfer_mode), 2000 / drive->drive_data);
- drive->current_speed = xfer_mode;
-
- return on;
+ return ide_config_drive_speed(drive, xfer_mode);
}
static void icside_dma_host_off(ide_drive_t *drive)
@@ -320,8 +315,7 @@ static int icside_dma_check(ide_drive_t *drive)
{
struct hd_driveid *id = drive->id;
ide_hwif_t *hwif = HWIF(drive);
- int xfer_mode = XFER_PIO_2;
- int on;
+ int xfer_mode = 0;
if (!(id->capability & 1) || !hwif->autodma)
goto out;
@@ -350,9 +344,10 @@ static int icside_dma_check(ide_drive_t *drive)
}
out:
- on = icside_set_speed(drive, xfer_mode);
+ if (xfer_mode == 0)
+ return -1;
- return on ? 0 : -1;
+ return icside_set_speed(drive, xfer_mode) ? -1 : 0;
}
static int icside_dma_end(ide_drive_t *drive)