crypto: cavium/nitrox - fix for command corruption in queue full case with backlog...
authorSrikanth Jampala <Jampala.Srikanth@cavium.com>
Wed, 22 Aug 2018 07:10:52 +0000 (12:40 +0530)
committerHerbert Xu <herbert@gondor.apana.org.au>
Sat, 25 Aug 2018 11:50:44 +0000 (19:50 +0800)
commit3d7c82060d1fe65bde4023aac41a0b1bd7718e07
treededb0fda56b347d8bd3d7ca124ca17c68d36d0a2
parent0522236d4f9c5ab2e79889cb020d1acbe5da416e
crypto: cavium/nitrox - fix for command corruption in queue full case with backlog submissions.

Earlier used to post the current command without checking queue full
     after backlog submissions. So, post the current command only after
     confirming the space in queue after backlog submissions.

     Maintain host write index instead of reading device registers
     to get the next free slot to post the command.

     Return -ENOSPC in queue full case.

Signed-off-by: Srikanth Jampala <Jampala.Srikanth@cavium.com>
Reviewed-by: Gadam Sreerama <sgadam@cavium.com>
Tested-by: Jha, Chandan <Chandan.Jha@cavium.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
drivers/crypto/cavium/nitrox/nitrox_dev.h
drivers/crypto/cavium/nitrox/nitrox_lib.c
drivers/crypto/cavium/nitrox/nitrox_reqmgr.c