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authorMark A. Greer <mgreer@animalcreek.com>2013-11-12 13:12:27 -0700
committerHerbert Xu <herbert@gondor.apana.org.au>2013-12-05 21:28:40 +0800
commitf13ab86a6123cc85c072253769fcaac72949ae93 (patch)
tree3a896286d5dd810755b2534ae40c21566f080a22 /drivers/crypto
parentf4875e12f3ddafef844e21321efc7fae03454387 (diff)
crypto: omap-sham - Only release DMA channel if successfully requested
In omap_sham_probe() and omap_sham_remove(), 'dd->dma_lch' is released without checking to see if it was successfully requested or not. This is a bug and was identified and reported by Dan Carpenter here: http://www.spinics.net/lists/devicetree/msg11023.html Add code to only release 'dd->dma_lch' when its not NULL (that is, when it was successfully requested). Reported-by: Dan Carpenter <dan.carpenter@oracle.com> CC: Joel Fernandes <joelf@ti.com> Signed-off-by: Mark A. Greer <mgreer@animalcreek.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/omap-sham.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c
index e45aaaf0db30..831f9a438b03 100644
--- a/drivers/crypto/omap-sham.c
+++ b/drivers/crypto/omap-sham.c
@@ -1970,7 +1970,8 @@ err_algs:
crypto_unregister_ahash(
&dd->pdata->algs_info[i].algs_list[j]);
pm_runtime_disable(dev);
- dma_release_channel(dd->dma_lch);
+ if (dd->dma_lch)
+ dma_release_channel(dd->dma_lch);
data_err:
dev_err(dev, "initialization failed.\n");
@@ -1994,7 +1995,9 @@ static int omap_sham_remove(struct platform_device *pdev)
&dd->pdata->algs_info[i].algs_list[j]);
tasklet_kill(&dd->done_task);
pm_runtime_disable(&pdev->dev);
- dma_release_channel(dd->dma_lch);
+
+ if (dd->dma_lch)
+ dma_release_channel(dd->dma_lch);
return 0;
}