From f44ae58a273b1b051122784a159ad608b7205afd Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Thu, 11 Oct 2007 23:54:00 +0200 Subject: [PATCH] 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 Cc: Sergei Shtylyov Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/arm/icside.c | 21 ++++++++------------- 1 file 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) -- GitLab