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functions
Omit extra messages for a memory allocation failure in these functions.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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irq would be set to -1 and then unused, if we failed to get IORESOURCE_MEM.
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Return -ENODEV when dma_request_slave_channel_compat() fails.
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Remove unnecessary static on local variable sha_dd. Such variable
is initialized before being used, on every execution path throughout
the function. The static has no benefit and, removing it reduces the
object file size.
This issue was detected using Coccinelle and the following semantic patch:
https://github.com/GustavoARSilva/coccinelle/blob/master/static/static_unused.cocci
In the following log you can see a significant difference in the object
file size. This log is the output of the size command, before and after
the code change:
before:
text data bss dec hex filename
30005 10264 128 40397 9dcd drivers/crypto/atmel-sha.o
after:
text data bss dec hex filename
29934 10208 64 40206 9d0e drivers/crypto/atmel-sha.o
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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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>
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This patch clarifies and fixes how errors should be handled by
atmel_sha_start().
For update operations, the previous code wrongly assumed that
(err != -EINPROGRESS) implies (err == 0). It's wrong because that doesn't
take the error cases (err < 0) into account.
This patch also adds many comments to detail all the possible returned
values and what should be done in each case.
Especially, when an error occurs, since atmel_sha_complete() has already
been called, hence releasing the hardware, atmel_sha_start() must not call
atmel_sha_finish_req() later otherwise atmel_sha_complete() would be
called a second time.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This patch fixes a previous patch: "crypto: atmel-sha - update request
queue management to make it more generic".
Indeed the patch above should have replaced the "return -EINVAL;" lines by
"return atmel_sha_complete(dd, -EINVAL);" but instead replaced them by a
simple call of "atmel_sha_complete(dd, -EINVAL);".
Hence all "return" instructions were missing.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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When we enable COMPILE_TEST building for the Atmel sha and tdes implementations,
we run into a couple of warnings about incorrect format strings, e.g.
In file included from include/linux/platform_device.h:14:0,
from drivers/crypto/atmel-sha.c:24:
drivers/crypto/atmel-sha.c: In function 'atmel_sha_xmit_cpu':
drivers/crypto/atmel-sha.c:571:19: error: format '%d' expects argument of type 'int', but argument 6 has type 'size_t {aka long unsigned int}' [-Werror=format=]
In file included from include/linux/printk.h:6:0,
from include/linux/kernel.h:13,
from drivers/crypto/atmel-tdes.c:17:
drivers/crypto/atmel-tdes.c: In function 'atmel_tdes_crypt_dma_stop':
include/linux/kern_levels.h:4:18: error: format '%u' expects argument of type 'unsigned int', but argument 2 has type 'size_t {aka long unsigned int}' [-Werror=format=]
These are all fixed by using the "%z" modifier for size_t data.
There are also a few uses of min()/max() with incompatible types:
drivers/crypto/atmel-tdes.c: In function 'atmel_tdes_crypt_start':
drivers/crypto/atmel-tdes.c:528:181: error: comparison of distinct pointer types lacks a cast [-Werror]
Where possible, we should use consistent types here, otherwise we can use
min_t()/max_t() to get well-defined behavior without a warning.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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When VERBOSE_DEBUG is defined and SHA_FLAGS_DUMP_REG flag is set in
dd->flags, this patch prints the register names and values when performing
IO accesses.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This patchs allows to combine the AES and SHA hardware accelerators on
some Atmel SoCs. Doing so, AES blocks are only written to/read from the
AES hardware. Those blocks are also transferred from the AES to the SHA
accelerator internally, without additionnal accesses to the system busses.
Hence, the AES and SHA accelerators work in parallel to process all the
data blocks, instead of serializing the process by (de)crypting those
blocks first then authenticating them after like the generic
crypto/authenc.c driver does.
Of course, both the AES and SHA hardware accelerators need to be available
before we can start to process the data blocks. Hence we use their crypto
request queue to synchronize both drivers.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This patch adds support to the hmac(shaX) algorithms.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This patch adds a simple function to perform data transfer with the DMA
controller.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This patch adds a simple function to perform data transfer with PIO, hence
handled by the CPU.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This patch simply defines a helper function to test the 'Data Ready' flag
of the Status Register. It also gives a chance for the crypto request to
be processed synchronously if this 'Data Ready' flag is already set when
polling the Status Register. Indeed, running synchronously avoid the
latency of the 'Data Ready' interrupt.
When the 'Data Ready' flag has not been set yet, we enable the associated
interrupt and resume processing the crypto request asynchronously from the
'done' task just as before.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This patch modifies the SHA_FLAGS_SHA* flags: those algo flags are now
organized as values of a single bitfield instead of individual bits.
This allows to reduce the number of bits needed to encode all possible
values. Also the new values match the SHA_MR_ALGO_SHA* values hence
the algorithm bitfield of the SHA_MR register could simply be set with:
mr = (mr & ~SHA_FLAGS_ALGO_MASK) | (ctx->flags & SHA_FLAGS_ALGO_MASK)
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This patch is a transitional patch. It updates atmel_sha_done_task() to
make it more generic. Indeed, it adds a new .resume() member in the
atmel_sha_dev structure. This hook is called from atmel_sha_done_task()
to resume processing an asynchronous request.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This patch is a transitional patch. It splits the atmel_sha_handle_queue()
function. Now atmel_sha_handle_queue() only manages the request queue and
calls a new .start() hook from the atmel_sha_ctx structure.
This hook allows to implement different kind of requests still handled by
a single queue.
Also when the req parameter of atmel_sha_handle_queue() refers to the very
same request as the one returned by crypto_dequeue_request(), the queue
management now gives a chance to this crypto request to be handled
synchronously, hence reducing latencies. The .start() hook returns 0 if
the crypto request was handled synchronously and -EINPROGRESS if the
crypto request still need to be handled asynchronously.
Besides, the new .is_async member of the atmel_sha_dev structure helps
tagging this asynchronous state. Indeed, the req->base.complete() callback
should not be called if the crypto request is handled synchronously.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This is a transitional patch: it creates the atmel_sha_find_dev() function,
which will be used in further patches to share the source code responsible
for finding a Atmel SHA device.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto update from Herbert Xu:
"Here is the crypto update for 4.6:
API:
- Convert remaining crypto_hash users to shash or ahash, also convert
blkcipher/ablkcipher users to skcipher.
- Remove crypto_hash interface.
- Remove crypto_pcomp interface.
- Add crypto engine for async cipher drivers.
- Add akcipher documentation.
- Add skcipher documentation.
Algorithms:
- Rename crypto/crc32 to avoid name clash with lib/crc32.
- Fix bug in keywrap where we zero the wrong pointer.
Drivers:
- Support T5/M5, T7/M7 SPARC CPUs in n2 hwrng driver.
- Add PIC32 hwrng driver.
- Support BCM6368 in bcm63xx hwrng driver.
- Pack structs for 32-bit compat users in qat.
- Use crypto engine in omap-aes.
- Add support for sama5d2x SoCs in atmel-sha.
- Make atmel-sha available again.
- Make sahara hashing available again.
- Make ccp hashing available again.
- Make sha1-mb available again.
- Add support for multiple devices in ccp.
- Improve DMA performance in caam.
- Add hashing support to rockchip"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (116 commits)
crypto: qat - remove redundant arbiter configuration
crypto: ux500 - fix checks of error code returned by devm_ioremap_resource()
crypto: atmel - fix checks of error code returned by devm_ioremap_resource()
crypto: qat - Change the definition of icp_qat_uof_regtype
hwrng: exynos - use __maybe_unused to hide pm functions
crypto: ccp - Add abstraction for device-specific calls
crypto: ccp - CCP versioning support
crypto: ccp - Support for multiple CCPs
crypto: ccp - Remove check for x86 family and model
crypto: ccp - memset request context to zero during import
lib/mpi: use "static inline" instead of "extern inline"
lib/mpi: avoid assembler warning
hwrng: bcm63xx - fix non device tree compatibility
crypto: testmgr - allow rfc3686 aes-ctr variants in fips mode.
crypto: qat - The AE id should be less than the maximal AE number
lib/mpi: Endianness fix
crypto: rockchip - add hash support for crypto engine in rk3288
crypto: xts - fix compile errors
crypto: doc - add skcipher API documentation
crypto: doc - update AEAD AD handling
...
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The change fixes potential oops while accessing iomem on invalid
address, if devm_ioremap_resource() fails due to some reason.
The devm_ioremap_resource() function returns ERR_PTR() and never
returns NULL, which makes useless a following check for NULL.
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Fixes: b0e8b3417a62 ("crypto: atmel - use devm_xxx() managed function")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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When (!ctx->bufcnt && !(ctx->flags & SHA_FLAGS_PAD)), the former source
code used to set the SHA_FLAGS_BUSY without checking whether this flag was
already set. If so, the hardware is already processing another hash
request so the processing of the req argument of atmel_sha_final() should
be delayed by queueing this request, the same way as done for the
(ctx->bufcnt != 0) case.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Using only the digest, digcnt[], bufcnt and buffer[] fields of the
struct atmel_sha_reqctx was not enough to import/export the request state,
so now we use the whole structure.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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clk_prepare()/clk_unprepare() must not be called within atomic context.
This patch calls clk_prepare() once for all from atmel_sha_probe() and
clk_unprepare() from atmel_sha_remove().
Then calls of clk_prepare_enable()/clk_disable_unprepare() were replaced
by calls of clk_enable()/clk_disable().
Cc: stable@vger.kernel.org
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Reported-by: Matthias Mayr <matthias.mayr@student.kit.edu>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Since atmel_sha_probe() uses devm_xxx functions to allocate resources,
atmel_sha_remove() should no longer explicitly release them.
Cc: stable@vger.kernel.org
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Fixes: b0e8b3417a62 ("crypto: atmel - use devm_xxx() managed function")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This patch implements the missing .import() and .export() mandatory
hooks for asynchronous hash algorithms. It also sets the relevant, non
zero, value for the .statesize field when declaring the supported SHA
algorithms. Indeed a zero value of .statesize prevents the algorithm from
being registered.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This patch saves the value of the internal hash register at the end of an
'update' operation then restores this value before starting the next
'update'. This way the driver can now properly handle context switches.
WARNING: only hardware versions from sama5d4x and later provide the
needed interface to update the internal hash value. Especially, sama5d3x
cannot implement this feature so context switches are still broken.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This patch adds support of hardware version 5.1.x embedded inside sama5d2x
SoCs.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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The 'done' tasklet handler used to check the 'BUSY' flag to either
finalize the processing of a crypto request which had just completed or
manage the crypto queue to start the next crypto request.
On request R1 completion, the driver calls atmel_sha_finish_req(), which:
1 - clears the 'BUSY' flag since the hardware is no longer used and is
ready again to process new crypto requests.
2 - notifies the above layer (the client) about the completion of the
asynchronous crypto request R1 by calling its base.complete()
callback.
3 - schedules the 'done' task to check the crypto queue and start to
process the next crypto request (the 'BUSY' flag is supposed to be
cleared at that moment) if such a pending request exists.
However step 2 might wake the client up so it can now ask our driver to
process a new crypto request R2. This request is enqueued by calling the
atmel_sha_handle_queue() function, which sets the 'BUSY' flags then
starts to process R2.
If the 'done' tasklet, scheduled by step 3, runs just after, it would see
that the 'BUSY' flag is set then understand that R2 has just completed,
which is wrong!
So the state of 'BUSY' flag is not a proper way to detect and handle
crypto request completion.
This patch fixes this race condition by using two different tasklets, one
to handle the crypto request completion events, the other to manage the
crypto queue if needed.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This patch fixes a crash which occured during the computation of the
digest of an empty message.
Indeed, when processing an empty message, the atmel_sha_handle_queue()
function was never called, hence the dd->req pointer remained
uninitialized.
Later, when the atmel_sha_final_req() function was called, it used
to crash while using this uninitialized dd->req pointer.
Hence this patch adds missing initializations of dd->req before calls of
the atmel_sha_final_req() function.
This bug prevented us from passing the tcrypt test suite on SHA algo.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Removed unused variable "err" and directly return "0"
Reported by coccicheck -
./drivers/crypto/atmel-sha.c:758:5-8: Unneeded variable: "err". Return "0" on line 766
Signed-off-by: Rahul Pathak <rpathak@visteon.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Using the devm_xxx() managed function to stripdown the error and remove
code.
Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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clk_prepare_enable() can fail so add a check for this and
return the error code if it fails.
Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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The maximum source and destination burst size is 16
according to the datasheet of Atmel DMA. And the value
is also checked in function at_xdmac_csize of Atmel
DMA driver. With the restrict, the value beyond maximum
value will not be processed in DMA driver, so SHA384 and
SHA512 will not work and the program will wait forever.
So here change the max burst size of all the cases to 16
in order to make SHA384 and SHA512 work and keep consistent
with DMA driver and datasheet.
Signed-off-by: Leilei Zhao <leilei.zhao@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Kernel will report "BUG: spinlock lockup suspected on CPU#0"
when CONFIG_DEBUG_SPINLOCK is enabled in kernel config and the
spinlock is used at the first time. It's caused by uninitialized
spinlock, so just initialize it in probe.
Signed-off-by: Leilei Zhao <leilei.zhao@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Having a zero length sg doesn't mean it is the end of the sg list. This
case happens when calculating HMAC of IPSec packet.
Signed-off-by: Leilei Zhao <leilei.zhao@atmel.com>
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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When a hash is requested on data bigger than the buffer allocated by the
SHA driver, the way DMA transfers are performed is quite strange:
The buffer is filled at each update request. When full, a DMA transfer
is done. On next update request, another DMA transfer is done. Then we
wait to have a full buffer (or the end of the data) to perform the dma
transfer. Such a situation lead sometimes, on SAMA5D4, to a case where
dma transfer is finished but the data ready irq never comes. Moreover
hash was incorrect in this case.
With this patch, dma transfers are only performed when the buffer is
full or when there is no more data. So it removes the transfer whose size
is equal the update size after the full buffer transmission.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Leilei Zhao <leilei.zhao@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Add new version of atmel-sha available with SAMA5D4 devices.
Signed-off-by: Leilei Zhao <leilei.zhao@atmel.com>
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Fix typo, "intialization" -> "initialization"
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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The fallback is never used, so there is no point in having it.
The cra_exit routine can also be removed, since all it did was releasing
the fallback, along with the stub around cra_init, which just added an
unused NULL argument.
Signed-off-by: Svenning Soerensen <sss@secomea.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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A platform_driver does not need to set an owner, it will be populated by the
driver core.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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This patch switches data allocation from kzalloc to devm_kzalloc.
It also removed some kfree() on data that was earlier allocated
using devm_kzalloc().
CC: Herbert Xu <herbert@gondor.apana.org.au>
CC: "David S. Miller" <davem@davemloft.net>
CC: Grant Likely <grant.likely@linaro.org>
CC: Rob Herring <robh+dt@kernel.org>
CC: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Pramod Gurav <pramod.gurav@smartplayin.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Depending on peripheral capabilities, print SHA information at the end
of the probe function.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
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Add support for Device Tree and use of the DMA DT API to
get the channels if needed.
Documentation is added for these DT nodes.
Initial code by: Nicolas Royer and Eukrea.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
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Updates from IP release 0x320 to 0x400:
- add DMA support (previous IP revision use PDC)
- add DMA double input buffer support
- add SHA224 support
Update from IP release 0x400 to 0x410:
- add SHA384 and SHA512 support
Signed-off-by: Nicolas Royer <nicolas@eukrea.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Eric Bénard <eric@eukrea.com>
Tested-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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CONFIG_HOTPLUG is going away as an option. As a result, the __dev*
markings need to be removed.
This change removes the use of __devinit, __devexit_p, __devinitdata,
and __devexit from these drivers.
Based on patches originally written by Bill Pemberton, but redone by me
in order to handle some of the coding style issues better, by hand.
Cc: Bill Pemberton <wfp5p@virginia.edu>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Kent Yoder <key@linux.vnet.ibm.com>
Cc: Jamie Iles <jamie@jamieiles.com>
Cc: Kim Phillips <kim.phillips@freescale.com>
Cc: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Cc: Alex Porosanu <alexandru.porosanu@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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From: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Remove duplicated include.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Signed-off-by: Nicolas Royer <nicolas@eukrea.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Eric Bénard <eric@eukrea.com>
Tested-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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