mmc: sdhci: fix NULL dereference in sdhci_request() tuning
authorChris Ball <cjb@laptop.org>
Mon, 5 Nov 2012 19:29:49 +0000 (14:29 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 17 Nov 2012 21:19:05 +0000 (13:19 -0800)
commit2091b753133a0bd22439357ed13f68fa595b8dd7
tree1d6b75250320d1c482922377dd26c8e06c8ab454
parent2d2db636c0f85a0fa4da6b6bc82d3474745b10de
mmc: sdhci: fix NULL dereference in sdhci_request() tuning

commit 14efd957209461bbdf285bf0d67e931955d04a4c upstream.

Commit 473b095a72a9 ("mmc: sdhci: fix incorrect command used in tuning")
introduced a NULL dereference at resume-time if an SD 3.0 host controller
raises the SDHCI_NEEDS_TUNING flag while no card is inserted.  Seen on an
OLPC XO-4 with sdhci-pxav3, but presumably affects other controllers too.

Signed-off-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/mmc/host/sdhci.c