diff options
| author | Peng Fan <van.freenix@gmail.com> | 2015-06-22 11:41:23 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2015-07-24 10:18:27 +0200 |
| commit | 7ac020366b0a436d726408841160b5dc32c19214 (patch) | |
| tree | 5809318d426171c41526b7f9b6edbce26f24ca85 /drivers | |
| parent | 5027cd1e323d2f8136abb32ac7c8e1e1a94eac05 (diff) | |
| download | linux-7ac020366b0a436d726408841160b5dc32c19214.tar.bz2 | |
mmc: sdhci check parameters before call dma_free_coherent
We should not call dma_free_coherent if host->adma_table is NULL,
otherwise may trigger panic.
Fixes: d1e49f77d7c7 ("mmc: sdhci: convert ADMA descriptors to a...")
Signed-off-by: Peng Fan <van.freenix@gmail.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index bc1445238fb3..655900f55244 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2978,8 +2978,11 @@ int sdhci_add_host(struct sdhci_host *host) GFP_KERNEL); host->align_buffer = kmalloc(host->align_buffer_sz, GFP_KERNEL); if (!host->adma_table || !host->align_buffer) { - dma_free_coherent(mmc_dev(mmc), host->adma_table_sz, - host->adma_table, host->adma_addr); + if (host->adma_table) + dma_free_coherent(mmc_dev(mmc), + host->adma_table_sz, + host->adma_table, + host->adma_addr); kfree(host->align_buffer); pr_warn("%s: Unable to allocate ADMA buffers - falling back to standard DMA\n", mmc_hostname(mmc)); |