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authorNishanth Menon <nm@ti.com>2013-12-03 19:43:13 -0600
committerHerbert Xu <herbert@gondor.apana.org.au>2013-12-05 21:28:43 +0800
commitf7b2b5dd6a62a47e871627c71ed01aa3482154d9 (patch)
tree4de401a7a20a39b801b5d2e672e7c3e9b5afc125 /drivers/crypto
parentc0e656b7a6e1ac03b2921d49211a735893efd544 (diff)
downloadlinux-f7b2b5dd6a62a47e871627c71ed01aa3482154d9.tar.bz2
crypto: omap-aes - add error check for pm_runtime_get_sync
The AES driver currently assumes that pm_runtime_get_sync will always succeed, which may not always be true, so add error handling for the same. This scenario was reported in the following bug: place. https://bugzilla.kernel.org/show_bug.cgi?id=66441 Reported-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de> Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/omap-aes.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c
index a9ccbf14096e..dde41f1df608 100644
--- a/drivers/crypto/omap-aes.c
+++ b/drivers/crypto/omap-aes.c
@@ -784,6 +784,7 @@ static int omap_aes_ctr_decrypt(struct ablkcipher_request *req)
static int omap_aes_cra_init(struct crypto_tfm *tfm)
{
struct omap_aes_dev *dd = NULL;
+ int err;
/* Find AES device, currently picks the first device */
spin_lock_bh(&list_lock);
@@ -792,7 +793,13 @@ static int omap_aes_cra_init(struct crypto_tfm *tfm)
}
spin_unlock_bh(&list_lock);
- pm_runtime_get_sync(dd->dev);
+ err = pm_runtime_get_sync(dd->dev);
+ if (err < 0) {
+ dev_err(dd->dev, "%s: failed to get_sync(%d)\n",
+ __func__, err);
+ return err;
+ }
+
tfm->crt_ablkcipher.reqsize = sizeof(struct omap_aes_reqctx);
return 0;
@@ -1182,7 +1189,12 @@ static int omap_aes_probe(struct platform_device *pdev)
dd->phys_base = res.start;
pm_runtime_enable(dev);
- pm_runtime_get_sync(dev);
+ err = pm_runtime_get_sync(dev);
+ if (err < 0) {
+ dev_err(dev, "%s: failed to get_sync(%d)\n",
+ __func__, err);
+ goto err_res;
+ }
omap_aes_dma_stop(dd);