Command "tcrypt sec=1 mode=403" give the follwoing error for Polling
mode:
root@am335x-evm:/# insmod tcrypt.ko sec=1 mode=403
[...]
[ 346.982754] test 15 ( 4096 byte blocks, 1024 bytes per update, 4 updates): 4352 opers/sec, 17825792 bytes/sec
[ 347.992661] test 16 ( 4096 byte blocks, 4096 bytes per update, 1 updates): 7095 opers/sec, 29061120 bytes/sec
[ 349.002667] test 17 ( 8192 byte blocks, 16 bytes per update, 512 updates):
[ 349.010882] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[ 349.020037] pgd = ddeac000
[ 349.022884] [00000000] *pgd=9dcb4831, *pte=00000000, *ppte=00000000
[ 349.029816] Internal error: Oops: 17 [#1] PREEMPT SMP ARM
[ 349.035482] Modules linked in: tcrypt(+)
[ 349.039617] CPU: 0 PID: 1473 Comm: insmod Not tainted 3.12.4-01566-g6279006-dirty #38
[ 349.047832] task: dda91540 ti: ddcd2000 task.ti: ddcd2000
[ 349.053517] PC is at omap_sham_xmit_dma+0x6c/0x238
[ 349.058544] LR is at omap_sham_xmit_dma+0x38/0x238
[ 349.063570] pc : [<c04eb7cc>] lr : [<c04eb798>] psr: 20000013
[ 349.063570] sp : ddcd3c78 ip : 00000000 fp : 9d8980b8
[ 349.075610] r10: 00000000 r9 : 00000000 r8 : 00000000
[ 349.081090] r7 : 00001000 r6 : dd898000 r5 : 00000040 r4 : ddb10550
[ 349.087935] r3 : 00000004 r2 : 00000010 r1 : 53100080 r0 : 00000000
[ 349.094783] Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
[ 349.102268] Control: 10c5387d Table: 9deac019 DAC: 00000015
[ 349.108294] Process insmod (pid: 1473, stack limit = 0xddcd2248)
[...]
This is because polling_mode is not enabled for ctx without FLAGS_FINUP.
For polling mode the bufcnt is made 0 unconditionally. But it should be made 0
only if it is a final update or a total is not zero(This condition is similar
to what is done in DMA case). Because of this wrong hashes are produced.
Fixing the same.
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
acef7b0f2b