]> err.no Git - linux-2.6/commit
sl82c105: DMA support fixes
authorSergei Shtylyov <sshtylyov@ru.mvista.com>
Sat, 17 Feb 2007 01:40:22 +0000 (02:40 +0100)
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Sat, 17 Feb 2007 01:40:22 +0000 (02:40 +0100)
commitea266ba1591d28889645a245e1df6f889c574640
tree71bff303517c720ad9022c47716481c863f7bbc2
parentfed21641be7b31338dcf6753ef7f8a396242a410
sl82c105: DMA support fixes

Fix a number of issues with the DMA support code:

- driver claims support for all SW/MW DMA modes while supporting only MWDMA2;

- ide_dma_check() method tries to enable DMA on the "known good" drives which
  don't support MWDMA2;

- ide_dma_on() method upon failure to set drive to MWDMA2 re-tunes already
  tuned PIO mode and calls ide_dma_off() method instead of returning error;

- ide_dma_off() method sets drive->current_speed while it doesn't actually
  change (only the PIO timings are re-loaded into the chip's registers);

- init_hwif() method forcibly sets/resets both "drive DMA capable" bits while
  this is properly handled by ide_dma_{on,off}() methods being called later...

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
drivers/ide/pci/sl82c105.c