diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/ll_rw_blk.c | 40 |
1 files changed, 35 insertions, 5 deletions
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c index 919e4baf478b..4889f7a8c2b7 100644 --- a/block/ll_rw_blk.c +++ b/block/ll_rw_blk.c @@ -3821,6 +3821,9 @@ static void complete_request(struct request *rq, int error) if (blk_queued_rq(rq)) blkdev_dequeue_request(rq); + if (blk_bidi_rq(rq) && !rq->end_io) + __blk_put_request(rq->next_rq->q, rq->next_rq); + end_that_request_last(rq, uptodate); } @@ -3828,14 +3831,15 @@ static void complete_request(struct request *rq, int error) * blk_end_io - Generic end_io function to complete a request. * @rq: the request being processed * @error: 0 for success, < 0 for error - * @nr_bytes: number of bytes to complete + * @nr_bytes: number of bytes to complete @rq + * @bidi_bytes: number of bytes to complete @rq->next_rq * @drv_callback: function called between completion of bios in the request * and completion of the request. * If the callback returns non 0, this helper returns without * completion of the request. * * Description: - * Ends I/O on a number of bytes attached to @rq. + * Ends I/O on a number of bytes attached to @rq and @rq->next_rq. * If @rq has leftover, sets it up for the next range of segments. * * Return: @@ -3843,7 +3847,7 @@ static void complete_request(struct request *rq, int error) * 1 - this request is not freed yet, it still has pending buffers. **/ static int blk_end_io(struct request *rq, int error, int nr_bytes, - int (drv_callback)(struct request *)) + int bidi_bytes, int (drv_callback)(struct request *)) { struct request_queue *q = rq->q; unsigned long flags = 0UL; @@ -3858,6 +3862,11 @@ static int blk_end_io(struct request *rq, int error, int nr_bytes, if (blk_fs_request(rq) || blk_pc_request(rq)) { if (__end_that_request_first(rq, uptodate, nr_bytes)) return 1; + + /* Bidi request must be completed as a whole */ + if (blk_bidi_rq(rq) && + __end_that_request_first(rq->next_rq, uptodate, bidi_bytes)) + return 1; } /* Special feature for tricky drivers */ @@ -3889,7 +3898,7 @@ static int blk_end_io(struct request *rq, int error, int nr_bytes, **/ int blk_end_request(struct request *rq, int error, int nr_bytes) { - return blk_end_io(rq, error, nr_bytes, NULL); + return blk_end_io(rq, error, nr_bytes, 0, NULL); } EXPORT_SYMBOL_GPL(blk_end_request); @@ -3930,6 +3939,27 @@ int __blk_end_request(struct request *rq, int error, int nr_bytes) EXPORT_SYMBOL_GPL(__blk_end_request); /** + * blk_end_bidi_request - Helper function for drivers to complete bidi request. + * @rq: the bidi request being processed + * @error: 0 for success, < 0 for error + * @nr_bytes: number of bytes to complete @rq + * @bidi_bytes: number of bytes to complete @rq->next_rq + * + * Description: + * Ends I/O on a number of bytes attached to @rq and @rq->next_rq. + * + * Return: + * 0 - we are done with this request + * 1 - still buffers pending for this request + **/ +int blk_end_bidi_request(struct request *rq, int error, int nr_bytes, + int bidi_bytes) +{ + return blk_end_io(rq, error, nr_bytes, bidi_bytes, NULL); +} +EXPORT_SYMBOL_GPL(blk_end_bidi_request); + +/** * blk_end_request_callback - Special helper function for tricky drivers * @rq: the request being processed * @error: 0 for success, < 0 for error @@ -3957,7 +3987,7 @@ EXPORT_SYMBOL_GPL(__blk_end_request); int blk_end_request_callback(struct request *rq, int error, int nr_bytes, int (drv_callback)(struct request *)) { - return blk_end_io(rq, error, nr_bytes, drv_callback); + return blk_end_io(rq, error, nr_bytes, 0, drv_callback); } EXPORT_SYMBOL_GPL(blk_end_request_callback); |