diff options
| author | Shawn Lin <shawn.lin@rock-chips.com> | 2016-08-26 03:49:55 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-09-26 22:31:15 +0300 |
| commit | 96e52daa508bf349582e41911da66461b54dcc12 (patch) | |
| tree | 9a96bd3a7f811e91e28500b99fa154f777e63453 /drivers/mmc/card | |
| parent | 67d35960f445176d5548c660a1b1708cad1c2042 (diff) | |
| download | linux-96e52daa508bf349582e41911da66461b54dcc12.tar.xz | |
mmc: block: remove the check of packed for packed request routine
packed should always exist without calling its cleanup function
explicitly. Moreover, we have use it when preparing packed list.
So I don't believe we should ever fall into this check again when
doing mmc_blk_packed_hdr_wrq_prep or mmc_blk_end_packed_req,etc.
And the code of mmc_blk_end_packed_req is trying to use packed before
checking it which makes it quite weird. This patch is trying to
remove these two checks and move it to the mmc_blk_prep_packed_list.
If we find packed is null, then we should never use MMC_BLK_PACKED_CMD.
By doing this, we could fall back to non-packed request if finding null
packed, though it's impossible theoretically.
After removing these two BUG_ONs, we also remove all other similar
checks within the routine of mmc_blk_issue_rw_rq which checks the
error handling of packed request.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/card')
| -rw-r--r-- | drivers/mmc/card/block.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index 2206d4477dbb..74c7625ee0db 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -142,8 +142,6 @@ static inline void mmc_blk_clear_packed(struct mmc_queue_req *mqrq) { struct mmc_packed *packed = mqrq->packed; - BUG_ON(!packed); - mqrq->cmd_type = MMC_PACKED_NONE; packed->nr_entries = MMC_PACKED_NR_ZERO; packed->idx_failure = MMC_PACKED_NR_IDX; @@ -1443,8 +1441,6 @@ static int mmc_blk_packed_err_check(struct mmc_card *card, int err, check, status; u8 *ext_csd; - BUG_ON(!packed); - packed->retries--; check = mmc_blk_err_check(card, areq); err = get_card_status(card, &status, 0); @@ -1673,6 +1669,18 @@ static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req) u8 max_packed_rw = 0; u8 reqs = 0; + /* + * We don't need to check packed for any further + * operation of packed stuff as we set MMC_PACKED_NONE + * and return zero for reqs if geting null packed. Also + * we clean the flag of MMC_BLK_PACKED_CMD to avoid doing + * it again when removing blk req. + */ + if (!mqrq->packed) { + md->flags &= (~MMC_BLK_PACKED_CMD); + goto no_packed; + } + if (!(md->flags & MMC_BLK_PACKED_CMD)) goto no_packed; @@ -1782,8 +1790,6 @@ static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq, u8 hdr_blocks; u8 i = 1; - BUG_ON(!packed); - mqrq->cmd_type = MMC_PACKED_WRITE; packed->blocks = 0; packed->idx_failure = MMC_PACKED_NR_IDX; @@ -1887,8 +1893,6 @@ static int mmc_blk_end_packed_req(struct mmc_queue_req *mq_rq) int idx = packed->idx_failure, i = 0; int ret = 0; - BUG_ON(!packed); - while (!list_empty(&packed->list)) { prq = list_entry_rq(packed->list.next); if (idx == i) { @@ -1917,8 +1921,6 @@ static void mmc_blk_abort_packed_req(struct mmc_queue_req *mq_rq) struct request *prq; struct mmc_packed *packed = mq_rq->packed; - BUG_ON(!packed); - while (!list_empty(&packed->list)) { prq = list_entry_rq(packed->list.next); list_del_init(&prq->queuelist); @@ -1935,8 +1937,6 @@ static void mmc_blk_revert_packed_req(struct mmc_queue *mq, struct request_queue *q = mq->queue; struct mmc_packed *packed = mq_rq->packed; - BUG_ON(!packed); - while (!list_empty(&packed->list)) { prq = list_entry_rq(packed->list.prev); if (prq->queuelist.prev != &packed->list) { |