Re: [PATCH v2] scsi: RDMA/srpt: remove unnecessary assertion in srpt_queue_response

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On 12/17/19 11:44 AM, Aditya Pakki wrote:
Currently, BUG_ON in srpt_queue_response, is used as an assertion for
empty rdma channel. However, if the channel is NULL, the call trace
on console is sufficient for diagnosis.

Signed-off-by: Aditya Pakki <pakki001@xxxxxxx>
---
v1: Avoid potential NULL pointer derefernce of ch. Current fix
suggested by Bart Van Assche
---
  drivers/infiniband/ulp/srpt/ib_srpt.c | 2 --
  1 file changed, 2 deletions(-)

diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c
index 23c782e3d49a..98552749d71c 100644
--- a/drivers/infiniband/ulp/srpt/ib_srpt.c
+++ b/drivers/infiniband/ulp/srpt/ib_srpt.c
@@ -2810,8 +2810,6 @@ static void srpt_queue_response(struct se_cmd *cmd)
  	int resp_len, ret, i;
  	u8 srp_tm_status;
- BUG_ON(!ch);
-
  	state = ioctx->state;
  	switch (state) {
  	case SRPT_STATE_NEW:

I think the description of this patch should also mention that this patch removes a check of a pointer after it has already been dereferenced. Anyway:

Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx>



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