From: Hemant Pedanekar <hemantp@xxxxxx> Date: Tue, 24 Nov 2009 17:20:50 +0530 > Currently, ide_cmd_ioctl when invoked for setting DMA transfer mode calls > ide_find_dma_mode with requested mode as XFER_UDMA_6. This prevents setting DMA > mode to any other value than the default (maximum) supported by the device (or > UDMA6, if supported) irrespective of the actual requested transfer mode and > returns error. > > For example, setting mode to UDMA2 using hdparm, where UDMA4 is the default > transfer mode gives following error: > # ./hdparm -d1 -Xudma2 /dev/hda > /dev/hda:hda: UDMA/66 mode selected > setting using_dma to 1 (on) > hda: UDMA/66 mode selected > setting xfermode to 66 (UltraDMA mode2) > HDIO_DRIVE_CMD(setxfermode) failed: Invalid argument > using_dma = 1 (on) > > This patch fixes the issue. > > Signed-off-by: Hemant Pedanekar <hemantp@xxxxxx> > Acked-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx> > Acked-by: Sergei Shtylyov <sshtylyov@xxxxxxxxxxxxx> Applied and queued up for -stable, thanks! -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
