Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

Pull crypto updates from Herbert Xu:
 "Here is the crypto update for 4.9:

  API:
   - The crypto engine code now supports hashes.

  Algorithms:
   - Allow keys >= 2048 bits in FIPS mode for RSA.

  Drivers:
   - Memory overwrite fix for vmx ghash.
   - Add support for building ARM sha1-neon in Thumb2 mode.
   - Reenable ARM ghash-ce code by adding import/export.
   - Reenable img-hash by adding import/export.
   - Add support for multiple cores in omap-aes.
   - Add little-endian support for sha1-powerpc.
   - Add Cavium HWRNG driver for ThunderX SoC"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (137 commits)
  crypto: caam - treat SGT address pointer as u64
  crypto: ccp - Make syslog errors human-readable
  crypto: ccp - clean up data structure
  crypto: vmx - Ensure ghash-generic is enabled
  crypto: testmgr - add guard to dst buffer for ahash_export
  crypto: caam - Unmap region obtained by of_iomap
  crypto: sha1-powerpc - little-endian support
  crypto: gcm - Fix IV buffer size in crypto_gcm_setkey
  crypto: vmx - Fix memory corruption caused by p8_ghash
  crypto: ghash-generic - move common definitions to a new header file
  crypto: caam - fix sg dump
  hwrng: omap - Only fail if pm_runtime_get_sync returns < 0
  crypto: omap-sham - shrink the internal buffer size
  crypto: omap-sham - add support for export/import
  crypto: omap-sham - convert driver logic to use sgs for data xmit
  crypto: omap-sham - change the DMA threshold value to a define
  crypto: omap-sham - add support functions for sg based data handling
  crypto: omap-sham - rename sgl to sgl_tmp for deprecation
  crypto: omap-sham - align algorithms on word offset
  crypto: omap-sham - add context export/import stubs
  ...

1 files changed, 1 insertions, 3 deletions

diff --git a/drivers/char/hw_random/st-rng.c b/drivers/char/hw_random/st-rng.c
index 1d35363d23c5..938ec10e733d 100644
--- a/drivers/char/hw_random/st-rng.c
+++ b/drivers/char/hw_random/st-rng.c
@@ -54,9 +54,6 @@ static int st_rng_read(struct hwrng *rng, void *data, size_t max, bool wait)
 	u32 status;
 	int i;
 
-	if (max < sizeof(u16))
-		return -EINVAL;
-
 	/* Wait until FIFO is full - max 4uS*/
 	for (i = 0; i < ST_RNG_FILL_FIFO_TIMEOUT; i++) {
 		status = readl_relaxed(ddata->base + ST_RNG_STATUS_REG);
@@ -111,6 +108,7 @@ static int st_rng_probe(struct platform_device *pdev)
 	ret = hwrng_register(&ddata->ops);
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to register HW RNG\n");
+		clk_disable_unprepare(clk);
 		return ret;
 	}