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mmc: atmel-mci: fix oops in atmci_tasklet_func

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commit fbd986cd42 upstream.

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

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rodolfo Giometti 2013-09-09 17:31:59 +02:00 • committed by Greg Kroah-Hartman
parent 6edfd0331f
commit 63a23e393f
1 changed files with 8 additions and 6 deletions
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14
drivers/mmc/host/atmel-mci.c
View file

@ -1794,12 +1794,14 @@ 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;
}
}
}