From: Mikulas Patocka Date: Fri, 20 Sep 2013 17:53:22 +0000 (-0400) Subject: skge: fix invalid value passed to pci_unmap_sigle X-Git-Tag: v3.12-rc4~30^2~45 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3361dc9538832a2a9150a8c722374ca844bf8dc8;p=pandora-kernel.git skge: fix invalid value passed to pci_unmap_sigle In my patch c194992cbe71c20bb3623a566af8d11b0bfaa721 ("skge: fix broken driver") I didn't fix the skge bug correctly. The value of the new mapping (not old) was passed to pci_unmap_single. If we enable CONFIG_DMA_API_DEBUG, it results in this warning: WARNING: CPU: 0 PID: 0 at lib/dma-debug.c:986 check_sync+0x4c4/0x580() skge 0000:02:07.0: DMA-API: device driver tries to sync DMA memory it has not allocated [device address=0x000000023a0096c0] [size=1536 bytes] This patch makes the skge driver pass the correct value to pci_unmap_single and fixes the warning. It copies the old descriptor to on-stack variable "ee" and unmaps it if mapping of the new descriptor succeeded. This patch should be backported to 3.11-stable. Signed-off-by: Mikulas Patocka Reported-by: Francois Romieu Tested-by: Mikulas Patocka Signed-off-by: David S. Miller --- Reading git-diff-tree failed