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* crypto: cavium - make several functions staticColin Ian King2017-07-121-4/+4
| | | | | | | | | | The functions cvm_encrypt, cvm_decrypt, cvm_xts_setkey and cvm_enc_dec_init does not need to be in global scope, so make them static. Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: chcr - Avoid algo allocation in softirq.Harsh Jain2017-07-122-8/+16
| | | | | | | | Thsi patch fixes calling "crypto_alloc_cipher" call in bottom halves. Pre allocate aes cipher required to update Tweak value for XTS. Signed-off-by: Harsh Jain <harsh@chelsio.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: caam - properly set IV after {en,de}cryptDavid Gstir2017-07-121-2/+18
| | | | | | | | | | | | | | | | | | | Certain cipher modes like CTS expect the IV (req->info) of ablkcipher_request (or equivalently req->iv of skcipher_request) to contain the last ciphertext block when the {en,de}crypt operation is done. This is currently not the case for the CAAM driver which in turn breaks e.g. cts(cbc(aes)) when the CAAM driver is enabled. This patch fixes the CAAM driver to properly set the IV after the {en,de}crypt operation of ablkcipher finishes. This issue was revealed by the changes in the SW CTS mode in commit 0605c41cc53ca ("crypto: cts - Convert to skcipher") Cc: <stable@vger.kernel.org> # 4.8+ Signed-off-by: David Gstir <david@sigma-star.at> Reviewed-by: Horia Geantă <horia.geanta@nxp.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: atmel - only treat EBUSY as transient if backlogGilad Ben-Yossef2017-07-121-1/+3
| | | | | | | | | | | The Atmel SHA driver was treating -EBUSY as indication of queueing to backlog without checking that backlog is enabled for the request. Fix it by checking request flags. Cc: <stable@vger.kernel.org> Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* NetworkingHerbert Xu2017-07-121-1/+1
| | | | | | | | | | | | | | | | | crypto: af_alg - Avoid sock_graft call warning The newly added sock_graft warning triggers in af_alg_accept. It's harmless as we're essentially doing sock->sk = sock->sk. The sock_graft call is actually redundant because all the work it does is subsumed by sock_init_data. However, it was added to placate SELinux as it uses it to initialise its internal state. This patch avoisd the warning by making the SELinux call directly. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: David S. Miller <davem@davemloft.net>
* crypto: caam - fix signals handlingHoria Geantă2017-07-122-2/+2
| | | | | | | | | | | | | | | | | | | | | | Driver does not properly handle the case when signals interrupt wait_for_completion_interruptible(): -it does not check for return value -completion structure is allocated on stack; in case a signal interrupts the sleep, it will go out of scope, causing the worker thread (caam_jr_dequeue) to fail when it accesses it wait_for_completion_interruptible() is replaced with uninterruptable wait_for_completion(). We choose to block all signals while waiting for I/O (device executing the split key generation job descriptor) since the alternative - in order to have a deterministic device state - would be to flush the job ring (aborting *all* in-progress jobs). Cc: <stable@vger.kernel.org> Fixes: 045e36780f115 ("crypto: caam - ahash hmac support") Fixes: 4c1ec1f930154 ("crypto: caam - refactor key_gen, sg") Signed-off-by: Horia Geantă <horia.geanta@nxp.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: sha1-ssse3 - Disable avx2Herbert Xu2017-07-051-1/+1
| | | | | | | | | | | It has been reported that sha1-avx2 can cause page faults by reading beyond the end of the input. This patch disables it until it can be fixed. Cc: <stable@vger.kernel.org> Fixes: 7c1da8d0d046 ("crypto: sha - SHA1 transform x86_64 AVX2") Reported-by: Jan Stancek <jstancek@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Herbert Xu2017-07-0511-43/+47
|\ | | | | | | Merge the crypto tree to pull in fixes for the next merge window.
| * crypto: caam - fix gfp allocation flags (part II)Horia Geantă2017-06-224-28/+25
| | | | | | | | | | | | | | | | | | | | | | This is the 2nd part of fixing the usage of GFP_KERNEL for memory allocations, taking care off all the places that haven't caused a real problem / failure. Again, the issue being fixed is that GFP_KERNEL should be used only when MAY_SLEEP flag is set, i.e. MAY_BACKLOG flag usage is orthogonal. Signed-off-by: Horia Geantă <horia.geanta@nxp.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| * crypto: caam - fix gfp allocation flags (part I)Horia Geantă2017-06-221-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Changes in the SW cts (ciphertext stealing) code in commit 0605c41cc53ca ("crypto: cts - Convert to skcipher") revealed a problem in the CAAM driver: when cts(cbc(aes)) is executed and cts runs in SW, cbc(aes) is offloaded in CAAM; cts encrypts the last block in atomic context and CAAM incorrectly decides to use GFP_KERNEL for memory allocation. Fix this by allowing GFP_KERNEL (sleeping) only when MAY_SLEEP flag is set, i.e. remove MAY_BACKLOG flag. We split the fix in two parts - first is sent to -stable, while the second is not (since there is no known failure case). Link: http://lkml.kernel.org/g/20170602122446.2427-1-david@sigma-star.at Cc: <stable@vger.kernel.org> # 4.8+ Reported-by: David Gstir <david@sigma-star.at> Signed-off-by: Horia Geantă <horia.geanta@nxp.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| * crypto: drbg - Fixes panic in wait_for_completion callStephan Mueller2017-06-221-0/+1
| | | | | | | | | | | | | | | | | | Initialise ctr_completion variable before use. Cc: <stable@vger.kernel.org> Signed-off-by: Harsh Jain <harshjain.prof@gmail.com> Signed-off-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| * crypto: Work around deallocated stack frame reference gcc bug on sparc.David Miller2017-06-084-5/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On sparc, if we have an alloca() like situation, as is the case with SHASH_DESC_ON_STACK(), we can end up referencing deallocated stack memory. The result can be that the value is clobbered if a trap or interrupt arrives at just the right instruction. It only occurs if the function ends returning a value from that alloca() area and that value can be placed into the return value register using a single instruction. For example, in lib/libcrc32c.c:crc32c() we end up with a return sequence like: return %i7+8 lduw [%o5+16], %o0 ! MEM[(u32 *)__shash_desc.1_10 + 16B], %o5 holds the base of the on-stack area allocated for the shash descriptor. But the return released the stack frame and the register window. So if an intererupt arrives between 'return' and 'lduw', then the value read at %o5+16 can be corrupted. Add a data compiler barrier to work around this problem. This is exactly what the gcc fix will end up doing as well, and it absolutely should not change the code generated for other cpus (unless gcc on them has the same bug :-) With crucial insight from Eric Sandeen. Cc: <stable@vger.kernel.org> Reported-by: Anatoly Pugachev <matorola@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| * crypto: gcm - wait for crypto op not signal safeGilad Ben-Yossef2017-05-231-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | crypto_gcm_setkey() was using wait_for_completion_interruptible() to wait for completion of async crypto op but if a signal occurs it may return before DMA ops of HW crypto provider finish, thus corrupting the data buffer that is kfree'ed in this case. Resolve this by using wait_for_completion() instead. Reported-by: Eric Biggers <ebiggers3@gmail.com> Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> CC: stable@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| * crypto: drbg - wait for crypto op not signal safeGilad Ben-Yossef2017-05-231-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | drbg_kcapi_sym_ctr() was using wait_for_completion_interruptible() to wait for completion of async crypto op but if a signal occurs it may return before DMA ops of HW crypto provider finish, thus corrupting the output buffer. Resolve this by using wait_for_completion() instead. Reported-by: Eric Biggers <ebiggers3@gmail.com> Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> CC: stable@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| * crypto: asymmetric_keys - handle EBUSY due to backlog correctlyGilad Ben-Yossef2017-05-231-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | public_key_verify_signature() was passing the CRYPTO_TFM_REQ_MAY_BACKLOG flag to akcipher_request_set_callback() but was not handling correctly the case where a -EBUSY error could be returned from the call to crypto_akcipher_verify() if backlog was used, possibly casuing data corruption due to use-after-free of buffers. Resolve this by handling -EBUSY correctly. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> CC: stable@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: testmgr - Reenable sha1/aes in FIPS modeHerbert Xu2017-06-281-0/+1
| | | | | | | | | | | | | | | | | | The combination of sha1 and aes was disabled in FIPS Mode accidentally. This patch reenables it. Fixes: 284a0f6e87b0 ("crypto: testmgr - Disable fips-allowed for...") Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: Stephan Müller <smueller@chronox.de>
* | crypto: ccp - Release locks before returningGary R Hook2017-06-221-4/+3
| | | | | | | | | | | | | | krobot warning: make sure that all error return paths release locks. Signed-off-by: Gary R Hook <gary.hook@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: cavium/nitrox - dma_mapping_error() returns boolDan Carpenter2017-06-221-6/+9
| | | | | | | | | | | | | | | | | | We want to return negative error codes here, but we're accidentally propogating the "true" return from dma_mapping_error(). Fixes: 14fa93cdcd9b ("crypto: cavium - Add support for CNN55XX adapters.") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: doc - fix typo in docsBenjamin Peterson2017-06-221-1/+1
| | | | | | | | | | Signed-off-by: Benjamin Peterson <bp@benjamin.pe> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | Documentation/bindings: Document the SafeXel cryptographic engine driverAntoine Ténart2017-06-221-0/+29
| | | | | | | | | | | | | | | | The Inside Secure Safexcel cryptographic engine is found on some Marvell SoCs (7k/8k). Document the bindings used by its driver. Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: caam - make of_device_ids const.Arvind Yadav2017-06-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | of_device_ids are not supposed to change at runtime. All functions working with of_device_ids provided by <linux/of.h> work with const of_device_ids. So mark the non-const structs as const. File size before: text data bss dec hex filename 2376 808 128 3312 cf0 drivers/crypto/caam/jr.o File size after constify caam_jr_match: text data bss dec hex filename 2976 192 128 3296 ce0 drivers/crypto/caam/jr.o Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: vmx - remove unnecessary checkTudor-Dan Ambarus2017-06-204-24/+4
| | | | | | | | | | | | | | | | | | You can't reach init() if parent alg_name is invalid. Moreover, cypto_alloc_base() will return ENOENT if alg_name is NULL. Found while grasping the fallback mechanism. Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: n2 - make of_device_ids constArvind Yadav2017-06-201-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | of_device_ids are not supposed to change at runtime. All functions working with of_device_ids provided by <linux/of.h> work with const of_device_ids. So mark the non-const structs as const. File size before: text data bss dec hex filename 2001 2168 48 4217 1079 drivers/crypto/n2_core.o File size after constify dummy_tlb_ops.: text data bss dec hex filename 3601 536 48 4185 1059 drivers/crypto/n2_core.o Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: inside-secure - use the base_end pointer in ring rollbackAntoine Ténart2017-06-201-1/+1
| | | | | | | | | | | | | | | | A base_end pointer is set and provided. Use it in the ring rollback function to avoid using build-in defines. Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: inside-secure - increase the batch sizeAntoine Ténart2017-06-201-1/+1
| | | | | | | | | | | | | | | | | | Increase the batch size to the maximum number of requests a ring can handle at a time (its size). This is possible now that the request queues are per hw ring. This improves performances. Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: inside-secure - only dequeue when neededAntoine Ténart2017-06-201-3/+3
| | | | | | | | | | | | | | | | This force the need_dequeue flag to be unset whenever the dequeue function is called, to avoid calling it when it is not necessary. Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: inside-secure - get the backlog before dequeueing the requestAntoine Ténart2017-06-201-1/+1
| | | | | | | | | | | | | | | | Get the backlog before dequeuing the request otherwise we'll miss the first request in line. Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: inside-secure - stop requeueing failed requestsAntoine Ténart2017-06-201-8/+10
| | | | | | | | | | | | | | | | | | This update the dequeue function of the inside-secure safexcel driver so that failed requests aren't requeued when they fail (for whatever reason, which can be because the hw ring is full). Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: inside-secure - use one queue per hw ringAntoine Ténart2017-06-204-85/+89
| | | | | | | | | | | | | | | | | | Update the inside-secure safexcel driver from using one global queue to one queue per hw ring. This ease the request management and keep the hw in sync with what's done in sw. Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: inside-secure - update the context and request laterAntoine Ténart2017-06-202-8/+7
| | | | | | | | | | | | | | | | | | This move the context and request updates at the end of the cipher and hash send() functions. This way the context and request fields are set only when everything else was successful in the send() functions. Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: inside-secure - align the cipher and hash send functionsOfer Heifetz2017-06-201-1/+1
| | | | | | | | | | | | | | | | | | The cipher and hash send functions both set the results variable, to be used later by the caller. Align the way they're setting this variable. Signed-off-by: Ofer Heifetz <oferh@marvell.com> Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: inside-secure - optimize DSE bufferability controlIgal Liberman2017-06-202-0/+2
| | | | | | | | | | | | | | | | | | Configure the data write bufferability to always buffer packets in the DSE. This change slightly improves performance. Signed-off-by: Igal Liberman <igall@marvell.com> Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: inside-secure - enable single WR in DSE configurationIgal Liberman2017-06-202-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | When enable_single_wr is not enabled, the DSE will only write those parts of a result descriptor that need updating, which means a final result descriptor will be written in 2 or 3 smaller transfers. When enable_single_wr is enabled the DSE will combine these 2-3 updates into one large write transfer, generally improving performance. Signed-off-by: Igal Liberman <igall@marvell.com> Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: inside-secure - fix incorrect DSE data cache settingAntoine Ténart2017-06-201-1/+1
| | | | | | | | | | | | | | | | | | | | Set the correct value to the DSE data cache, using WR_CACHE_3BITS instead of RD_CACHE_3BITS. This fixes an incorrect setting and helps improving performances. Reported-by: Igal Liberman <igall@marvell.com> Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: inside-secure - fix the ring wr_cache offsetAntoine Ténart2017-06-201-1/+1
| | | | | | | | | | | | | | | | | | The EIP197_HIA_xDR_CFG_WR_CACHE macro was defined to use an offset of 23, which is wrong as it's actually 25. Fix this. Reported-by: Igal Liberman <igall@marvell.com> Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: inside-secure - use hmac ipad/opad constantsAntoine Ténart2017-06-201-2/+3
| | | | | | | | | | | | | | Replace the hmac ipad/opad values by their defined constants. Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: chcr - Select device in Round Robin fashionHarsh Jain2017-06-205-21/+44
| | | | | | | | | | | | | | | | | | When multiple devices are present in system select device in round-robin fashion for crypto operations Signed-off-by: Atul Gupta <atul.gupta@chelsio.com> Reviewed-by: Ganesh Goudar <ganeshgr@chelsio.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: chcr - Ensure Destination sg entry size less than 2kHarsh Jain2017-06-202-17/+142
| | | | | | | | | | | | | | | | Allocate new sg list in case received destination sg list has entry greater that 2k. Signed-off-by: Harsh Jain <harsh@chelsio.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | MAINTAINERS: Add maintainer for chelsio crypto driverHarsh Jain2017-06-201-0/+7
| | | | | | | | | | | | | | Add myself as maintainer for chcr. Signed-off-by: Harsh Jain <harsh@chelsio.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | chcr - Add debug countersHarsh Jain2017-06-205-1/+62
| | | | | | | | | | | | | | Count types of operation done by HW. Signed-off-by: Harsh Jain <harsh@chelsio.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: chcr - Add ctr mode and process large sg entries for cipherHarsh Jain2017-06-205-145/+690
| | | | | | | | | | | | | | | | It send multiple WRs to H/W to handle large sg lists. Adds ctr(aes) and rfc(ctr(aes)) modes. Signed-off-by: Harsh Jain <harsh@chelsio.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: chcr - Avoid changing request structureHarsh Jain2017-06-201-23/+14
| | | | | | | | | | | | | | Do not update assoclen received in aead_request. Signed-off-by: Harsh Jain <harsh@chelsio.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: chcr - Return correct error codeHarsh Jain2017-06-201-34/+42
| | | | | | | | | | | | | | Return correct error instead of EINVAL. Signed-off-by: Harsh Jain <harsh@chelsio.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: chcr - Fix fallback key settingHarsh Jain2017-06-201-1/+11
| | | | | | | | | | | | | | Set key of fallback tfm for rfc4309. Signed-off-by: Harsh Jain <harsh@chelsio.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: chcr - Pass lcb bit setting to firmwareHarsh Jain2017-06-202-9/+13
| | | | | | | | | | | | | | | | GCM and CBC mode of operation requires Last Cipher Block. This patch set lcb bit in WR header when required. Signed-off-by: Harsh Jain <harsh@chelsio.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: cavium - fix spelling mistake "Revsion" -> "Revision"Colin Ian King2017-06-201-1/+1
| | | | | | | | | | | | | | Trivial fix to spelling mistake in seq_printf message Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: omap-aes - fix spelling mistake "Encryptio" -> "Encryption"Colin Ian King2017-06-201-1/+1
| | | | | | | | | | | | | | Trivial fix to spelling mistake in pr_err message Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | crypto: testmgr - add testvector for pkcs1pad(rsa)Stephan Mueller2017-06-202-4/+125
| | | | | | | | | | | | | | | | | | | | The PKCS#1 RSA implementation is provided with a self test with RSA 2048 and SHA-256. This self test implicitly covers other RSA keys and other hashes. Also, this self test implies that the pkcs1pad(rsa) is FIPS 140-2 compliant. Signed-off-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | MAINTAINERS: add entry for MediaTek Random Number GeneratorSean Wang2017-06-201-0/+5
| | | | | | | | | | | | | | | | | | I work for MediaTek on maintaining the MediaTek RNG driver for the existing SoCs and adding support for the following SoCs. Signed-off-by: Sean Wang <sean.wang@mediatek.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | hwrng: mtk - add runtime PM supportSean Wang2017-06-201-0/+42
| | | | | | | | | | | | | | | | Add runtime PM support. There will be the benefit on SoCs where the clock to the RNG used can be shutdown. Signed-off-by: Sean Wang <sean.wang@mediatek.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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