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mmc: atmel-mci: fix oops in atmci_tasklet_func

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In some cases, a NULL pointer dereference happens because data is NULL when
STATE_END_REQUEST case is reached in atmci_tasklet_func.

Cc: <stable@vger.kernel.org> # 3.9+
Signed-off-by: Rodolfo Giometti <giometti@enneenne.com>
Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Rodolfo Giometti 2013-09-09 17:31:59 +02:00 committed by Chris Ball
parent c1fa3426aa
commit fbd986cd42
1 changed files with 8 additions and 6 deletions
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14
drivers/mmc/host/atmel-mci.c
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@ -1810,12 +1810,14 @@ static void atmci_tasklet_func(unsigned long priv)
if (unlikely(status)) {
host->stop_transfer(host);
host->data = NULL;
if (status & ATMCI_DTOE) {
data->error = -ETIMEDOUT;
} else if (status & ATMCI_DCRCE) {
data->error = -EILSEQ;
} else {
data->error = -EIO;
if (data) {
if (status & ATMCI_DTOE) {
data->error = -ETIMEDOUT;
} else if (status & ATMCI_DCRCE) {
data->error = -EILSEQ;
} else {
data->error = -EIO;
}
}
}