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| author | Mark A. Greer <mgreer@animalcreek.com> | 2013-11-12 13:12:27 -0700 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2013-12-05 21:28:40 +0800 |
| commit | f13ab86a6123cc85c072253769fcaac72949ae93 (patch) | |
| tree | 3a896286d5dd810755b2534ae40c21566f080a22 /drivers/crypto | |
| parent | f4875e12f3ddafef844e21321efc7fae03454387 (diff) | |
| download | linux-f13ab86a6123cc85c072253769fcaac72949ae93.tar.gz | |
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.c | 7 |
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; } |