forked from Minki/linux
nvme: add NVME_SC_CANCELLED
To properly document how we are using a negative Linux error value to communicate request cancellations inside the driver. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Jens Axboe <axboe@fb.com>
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@ -19,6 +19,16 @@
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#include <linux/kref.h>
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#include <linux/blk-mq.h>
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enum {
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/*
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* Driver internal status code for commands that were cancelled due
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* to timeouts or controller shutdown. The value is negative so
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* that it a) doesn't overlap with the unsigned hardware error codes,
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* and b) can easily be tested for.
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*/
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NVME_SC_CANCELLED = -EINTR,
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};
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extern unsigned char nvme_io_timeout;
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#define NVME_IO_TIMEOUT (nvme_io_timeout * HZ)
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@ -621,7 +621,7 @@ static void req_completion(struct nvme_queue *nvmeq, void *ctx,
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if (req->cmd_type == REQ_TYPE_DRV_PRIV) {
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if (cmd_rq->ctx == CMD_CTX_CANCELLED)
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error = -EINTR;
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error = NVME_SC_CANCELLED;
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else
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error = status;
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} else {
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