4.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Peng Fan <van.free...@gmail.com>
commit 7ac020366b0a436d726408841160b5dc32c19214 upstream.
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.free...@gmail.com>
Acked-by: Adrian Hunter <adrian.hun...@intel.com>
Signed-off-by: Ulf Hansson <ulf.hans...@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/mmc/host/sdhci.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -3037,8 +3037,11 @@ int sdhci_add_host(struct sdhci_host *ho
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));
--
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