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| author | Rabin Vincent <rabin.vincent@axis.com> | 2015-11-27 14:59:11 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2015-12-22 13:32:18 +0300 |
| commit | 05caee939f8d58d81e962071da85761e1e3a4c73 (patch) | |
| tree | 66f4f2a7224de468b916bd9d53eca0424b963475 /drivers/mmc/host/usdhi6rol0.c | |
| parent | 60b71f607796f10ec8814312724759574398512b (diff) | |
| download | linux-05caee939f8d58d81e962071da85761e1e3a4c73.tar.xz | |
mmc: usdhi6rol0: handle NULL data in timeout
Commit bb08a7d489bd ("mmc: usdhi6rol0: fix NULL pointer deref in debug
print") fixed one NULL pointer dereference but unfortunately introduced
another. "data" may be NULL if this is a command timeout for a command
without any data, so we should only use it if we're actually waiting for
data.
Fixes: bb08a7d489bd ("mmc: usdhi6rol0: fix NULL pointer deref in debug print")
Cc: stable@vger.kernel.org # v4.3
Signed-off-by: Rabin Vincent <rabin.vincent@axis.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/usdhi6rol0.c')
| -rw-r--r-- | drivers/mmc/host/usdhi6rol0.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/mmc/host/usdhi6rol0.c b/drivers/mmc/host/usdhi6rol0.c index 4498e92116b8..b47122d3e8d8 100644 --- a/drivers/mmc/host/usdhi6rol0.c +++ b/drivers/mmc/host/usdhi6rol0.c @@ -1634,7 +1634,7 @@ static void usdhi6_timeout_work(struct work_struct *work) struct usdhi6_host *host = container_of(d, struct usdhi6_host, timeout_work); struct mmc_request *mrq = host->mrq; struct mmc_data *data = mrq ? mrq->data : NULL; - struct scatterlist *sg = host->sg ?: data->sg; + struct scatterlist *sg; dev_warn(mmc_dev(host->mmc), "%s timeout wait %u CMD%d: IRQ 0x%08x:0x%08x, last IRQ 0x%08x\n", @@ -1666,6 +1666,7 @@ static void usdhi6_timeout_work(struct work_struct *work) case USDHI6_WAIT_FOR_MWRITE: case USDHI6_WAIT_FOR_READ: case USDHI6_WAIT_FOR_WRITE: + sg = host->sg ?: data->sg; dev_dbg(mmc_dev(host->mmc), "%c: page #%u @ +0x%zx %ux%u in SG%u. Current SG %u bytes @ %u\n", data->flags & MMC_DATA_READ ? 'R' : 'W', host->page_idx, |