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authorRabin Vincent <rabin.vincent@axis.com>2015-08-19 15:41:35 +0200
committerUlf Hansson <ulf.hansson@linaro.org>2015-08-27 14:50:55 +0200
commitbb08a7d489bd22a9b6e489f8c8449b0bc92594d0 (patch)
tree6c2af778c7119fa85251d2fce24dcdda1504a319 /drivers/mmc
parent767264725d6c0c8e2a42f14ded88c8f05fec5863 (diff)
mmc: usdhi6rol0: fix NULL pointer deref in debug print
host->sg is only set when we're transferring multiple blocks. Check for its availibility before dereferencing it in the timeout work debug print. Signed-off-by: Rabin Vincent <rabin.vincent@axis.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/usdhi6rol0.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/mmc/host/usdhi6rol0.c b/drivers/mmc/host/usdhi6rol0.c
index 63d5d722b01f..4188e84ea450 100644
--- a/drivers/mmc/host/usdhi6rol0.c
+++ b/drivers/mmc/host/usdhi6rol0.c
@@ -1634,6 +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;
dev_warn(mmc_dev(host->mmc),
"%s timeout wait %u CMD%d: IRQ 0x%08x:0x%08x, last IRQ 0x%08x\n",
@@ -1669,7 +1670,7 @@ static void usdhi6_timeout_work(struct work_struct *work)
"%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,
host->offset, data->blocks, data->blksz, data->sg_len,
- sg_dma_len(host->sg), host->sg->offset);
+ sg_dma_len(sg), sg->offset);
usdhi6_sg_unmap(host, true);
/*
* If USDHI6_WAIT_FOR_DATA_END times out, we have already unmapped