From: Bartlomiej Zolnierkiewicz Date: Sun, 20 Dec 2009 18:22:33 +0000 (+0100) Subject: pata_cmd64x: fix overclocking of UDMA0-2 modes X-Git-Tag: v2.6.27.43~8 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d88be46507ffa20e69a237d5c7bfead253ad7c69;p=pandora-kernel.git pata_cmd64x: fix overclocking of UDMA0-2 modes commit 509426bd46ad0903dca409803e0ee3d30f99f1e8 upstream. adev->dma_mode stores the transfer mode value not UDMA mode number so the condition in cmd64x_set_dmamode() is always true and the higher UDMA clock is always selected. This can potentially result in data corruption when UDMA33 device is used, when 40-wire cable is used or when the error recovery code decides to lower the device speed down. The issue was introduced in the commit 6a40da0 ("libata cmd64x: whack into a shape that looks like the documentation") which goes back to kernel 2.6.20. Signed-off-by: Bartlomiej Zolnierkiewicz Signed-off-by: Jeff Garzik Signed-off-by: Greg Kroah-Hartman --- Reading git-diff-tree failed