[PATCH 5.4 248/320] crypto: caam - replace this_cpu_ptr with raw_cpu_ptr

Greg Kroah-Hartman
2022-01-24T19:41:07Z

From: Meng Li <Meng.Li@windriver.com>

commit efd21e10fc3bf4c6da122470a5ae89ec4ed8d180 upstream.

When enable the kernel debug config, there is below calltrace detected:
BUG: using smp_processor_id() in preemptible [00000000] code: cryptomgr_test/339
caller is debug_smp_processor_id+0x20/0x30
CPU: 9 PID: 339 Comm: cryptomgr_test Not tainted 5.10.63-yocto-standard #1
Hardware name: NXP Layerscape LX2160ARDB (DT)
Call trace:
dump_backtrace+0x0/0x1a0
show_stack+0x24/0x30
dump_stack+0xf0/0x13c
check_preemption_disabled+0x100/0x110
debug_smp_processor_id+0x20/0x30
dpaa2_caam_enqueue+0x10c/0x25c
......
cryptomgr_test+0x38/0x60
kthread+0x158/0x164
ret_from_fork+0x10/0x38
According to the comment in commit ac5d15b4519f("crypto: caam/qi2
- use affine DPIOs "), because preemption is no longer disabled
while trying to enqueue an FQID, it might be possible to run the
enqueue on a different CPU(due to migration, when in process context),
however this wouldn't be a functionality issue. But there will be
above calltrace when enable kernel debug config. So, replace this_cpu_ptr
with raw_cpu_ptr to avoid above call trace.

Fixes: ac5d15b4519f ("crypto: caam/qi2 - use affine DPIOs")
Cc: stable@vger.kernel.org
Signed-off-by: Meng Li <Meng.Li@windriver.com>
Reviewed-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/crypto/caam/caamalg_qi2.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/crypto/caam/caamalg_qi2.c
+++ b/drivers/crypto/caam/caamalg_qi2.c
@@ -5421,7 +5421,7 @@ int dpaa2_caam_enqueue(struct device *de
dpaa2_fd_set_len(&fd, dpaa2_fl_get_len(&req->fd_flt[1]));
dpaa2_fd_set_flc(&fd, req->flc_dma);

- ppriv = this_cpu_ptr(priv->ppriv);
+ ppriv = raw_cpu_ptr(priv->ppriv);
for (i = 0; i < (priv->dpseci_attr.num_tx_queues << 1); i++) {
err = dpaa2_io_service_enqueue_fq(ppriv->dpio, ppriv->req_fqid,
&fd);