diff options
| author | Pali Rohár <pali.rohar@gmail.com> | 2015-03-08 13:01:01 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-05-15 09:57:43 +0300 |
| commit | 604c31039dae4653f33003d08c91ef58b70b5e63 (patch) | |
| tree | e5621a2bae539aac9c5f413a5423749f13ceb41c /drivers | |
| parent | ca7fc7e962fa067ba31f76a6e5828537394f6481 (diff) | |
| download | linux-604c31039dae4653f33003d08c91ef58b70b5e63.tar.xz | |
crypto: omap-sham - Check for return value from pm_runtime_get_sync
Function pm_runtime_get_sync could fail and we need to check return
value to prevent kernel crash.
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/crypto/omap-sham.c | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c index 4d63e0d4da9a..a6703204fd86 100644 --- a/drivers/crypto/omap-sham.c +++ b/drivers/crypto/omap-sham.c @@ -362,7 +362,13 @@ static void omap_sham_copy_ready_hash(struct ahash_request *req) static int omap_sham_hw_init(struct omap_sham_dev *dd) { - pm_runtime_get_sync(dd->dev); + int err; + + err = pm_runtime_get_sync(dd->dev); + if (err < 0) { + dev_err(dd->dev, "failed to get sync: %d\n", err); + return err; + } if (!test_bit(FLAGS_INIT, &dd->flags)) { set_bit(FLAGS_INIT, &dd->flags); @@ -1947,7 +1953,13 @@ static int omap_sham_probe(struct platform_device *pdev) pm_runtime_enable(dev); pm_runtime_irq_safe(dev); - pm_runtime_get_sync(dev); + + err = pm_runtime_get_sync(dev); + if (err < 0) { + dev_err(dev, "failed to get sync: %d\n", err); + goto err_pm; + } + rev = omap_sham_read(dd, SHA_REG_REV(dd)); pm_runtime_put_sync(&pdev->dev); @@ -1977,6 +1989,7 @@ err_algs: for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--) crypto_unregister_ahash( &dd->pdata->algs_info[i].algs_list[j]); +err_pm: pm_runtime_disable(dev); if (dd->dma_lch) dma_release_channel(dd->dma_lch); @@ -2019,7 +2032,11 @@ static int omap_sham_suspend(struct device *dev) static int omap_sham_resume(struct device *dev) { - pm_runtime_get_sync(dev); + int err = pm_runtime_get_sync(dev); + if (err < 0) { + dev_err(dev, "failed to get sync: %d\n", err); + return err; + } return 0; } #endif |