linux-bl808/drivers/crypto/qat/qat_common
Eric Biggers 877b5691f2 crypto: shash - remove shash_desc::flags
The flags field in 'struct shash_desc' never actually does anything.
The only ostensibly supported flag is CRYPTO_TFM_REQ_MAY_SLEEP.
However, no shash algorithm ever sleeps, making this flag a no-op.

With this being the case, inevitably some users who can't sleep wrongly
pass MAY_SLEEP.  These would all need to be fixed if any shash algorithm
actually started sleeping.  For example, the shash_ahash_*() functions,
which wrap a shash algorithm with the ahash API, pass through MAY_SLEEP
from the ahash API to the shash API.  However, the shash functions are
called under kmap_atomic(), so actually they're assumed to never sleep.

Even if it turns out that some users do need preemption points while
hashing large buffers, we could easily provide a helper function
crypto_shash_update_large() which divides the data into smaller chunks
and calls crypto_shash_update() and cond_resched() for each chunk.  It's
not necessary to have a flag in 'struct shash_desc', nor is it necessary
to make individual shash algorithms aware of this at all.

Therefore, remove shash_desc::flags, and document that the
crypto_shash_*() functions can be called from any context.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-04-25 15:38:12 +08:00
..
adf_accel_devices.h
adf_accel_engine.c
adf_admin.c
adf_aer.c
adf_cfg.c crypto: qat - no need to check return value of debugfs_create functions 2019-02-01 14:42:03 +08:00
adf_cfg.h
adf_cfg_common.h
adf_cfg_strings.h
adf_cfg_user.h
adf_common_drv.h
adf_ctl_drv.c
adf_dev_mgr.c
adf_hw_arbiter.c
adf_init.c
adf_isr.c
adf_pf2vf_msg.c
adf_pf2vf_msg.h
adf_sriov.c
adf_transport.c crypto: qat - Remove unused goto label 2019-02-08 15:30:09 +08:00
adf_transport.h
adf_transport_access_macros.h
adf_transport_debug.c crypto: qat - no need to check return value of debugfs_create functions 2019-02-01 14:42:03 +08:00
adf_transport_internal.h
adf_vf2pf_msg.c
adf_vf_isr.c
icp_qat_fw.h
icp_qat_fw_init_admin.h
icp_qat_fw_la.h
icp_qat_fw_loader_handle.h
icp_qat_fw_pke.h
icp_qat_hal.h
icp_qat_hw.h
icp_qat_uclo.h
Makefile
qat_algs.c crypto: shash - remove shash_desc::flags 2019-04-25 15:38:12 +08:00
qat_asym_algs.c crypto: rsa - unimplement sign/verify for raw RSA backends 2019-04-18 22:15:02 +08:00
qat_crypto.c
qat_crypto.h
qat_hal.c
qat_uclo.c