forked from Minki/linux
nvme: fix sqhd reference when admin queue connect fails
Fix bug in sqhd patch. It wasn't the sq that was at risk. In the case where the admin queue connect command fails, the sq->size field is not set. Therefore, this becomes a divide by zero error. Add a quick check to bypass under this failure condition. Signed-off-by: James Smart <james.smart@broadcom.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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@ -390,7 +390,8 @@ static void __nvmet_req_complete(struct nvmet_req *req, u16 status)
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if (status)
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nvmet_set_status(req, status);
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req->sq->sqhd = (req->sq->sqhd + 1) % req->sq->size;
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if (req->sq->size)
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req->sq->sqhd = (req->sq->sqhd + 1) % req->sq->size;
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req->rsp->sq_head = cpu_to_le16(req->sq->sqhd);
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req->rsp->sq_id = cpu_to_le16(req->sq->qid);
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req->rsp->command_id = req->cmd->common.command_id;
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