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author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-10-10 22:39:28 +0200 |
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committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-10-10 22:39:28 +0200 |
commit | af5dfe8cf07b6f4fbd6b7d8ff1aeda718fdd0166 (patch) | |
tree | e60609e67d0c91cedcfdc8517f2f7ebbacbbee3d /drivers | |
parent | 151a670186a0f8441798f90c8701647adb7a1589 (diff) | |
download | blackbird-op-linux-af5dfe8cf07b6f4fbd6b7d8ff1aeda718fdd0166.tar.gz blackbird-op-linux-af5dfe8cf07b6f4fbd6b7d8ff1aeda718fdd0166.zip |
cmd640: add __set_prefetch_mode()
Factor out the common code from check_prefetch()
and set_prefetch_mode() to __set_prefetch_mode().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/ide/pci/cmd640.c | 42 |
1 files changed, 20 insertions, 22 deletions
diff --git a/drivers/ide/pci/cmd640.c b/drivers/ide/pci/cmd640.c index 5b756757e049..7f39cdb41410 100644 --- a/drivers/ide/pci/cmd640.c +++ b/drivers/ide/pci/cmd640.c @@ -374,6 +374,21 @@ static void cmd640_dump_regs(void) } #endif +static void __set_prefetch_mode(ide_drive_t *drive, int mode) +{ + if (mode) { /* want prefetch on? */ +#if CMD640_PREFETCH_MASKS + drive->no_unmask = 1; + drive->unmask = 0; +#endif + drive->no_io_32bit = 0; + } else { + drive->no_unmask = 0; + drive->no_io_32bit = 1; + drive->io_32bit = 0; + } +} + #ifndef CONFIG_BLK_DEV_CMD640_ENHANCED /* * Check whether prefetch is on for a drive, @@ -383,19 +398,10 @@ static void __init check_prefetch(ide_drive_t *drive, unsigned int index) { u8 b = get_cmd640_reg(prefetch_regs[index]); - if (b & prefetch_masks[index]) { /* is prefetch off? */ - drive->no_unmask = 0; - drive->no_io_32bit = 1; - drive->io_32bit = 0; - } else { -#if CMD640_PREFETCH_MASKS - drive->no_unmask = 1; - drive->unmask = 0; -#endif - drive->no_io_32bit = 0; - } + __set_prefetch_mode(drive, (b & prefetch_masks[index]) ? 0 : 1); } #else + /* * Sets prefetch mode for a drive. */ @@ -407,19 +413,11 @@ static void set_prefetch_mode(ide_drive_t *drive, unsigned int index, int mode) spin_lock_irqsave(&cmd640_lock, flags); b = __get_cmd640_reg(reg); - if (mode) { /* want prefetch on? */ -#if CMD640_PREFETCH_MASKS - drive->no_unmask = 1; - drive->unmask = 0; -#endif - drive->no_io_32bit = 0; + __set_prefetch_mode(drive, mode); + if (mode) b &= ~prefetch_masks[index]; /* enable prefetch */ - } else { - drive->no_unmask = 0; - drive->no_io_32bit = 1; - drive->io_32bit = 0; + else b |= prefetch_masks[index]; /* disable prefetch */ - } __put_cmd640_reg(reg, b); spin_unlock_irqrestore(&cmd640_lock, flags); } |