evie/android_kernel_oneplus_msm8998
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mmc: block: do not pack REQ_FUA request

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This change will prevent packing of a request marked with REQ_FUA flag,
because it has the same semantics as REQ_FLUSH. Also packing statistics are
updated with FUA stop reason.

Change-Id: Iaad37044ec43f93e898ed0c011b0bce7b91ae13d
Signed-off-by: Konstantin Dorfman <kdorfman@codeaurora.org>
This commit is contained in:
Konstantin Dorfman 2013-02-05 16:26:19 +02:00 • committed by Subhash Jadavani
parent aa4228ea9d
commit 8cd10b13a9
3 changed files with 16 additions and 0 deletions
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8
drivers/mmc/card/block.c
View file

@ -2027,6 +2027,9 @@ static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
!IS_ALIGNED(blk_rq_sectors(cur), 8))
goto no_packed;
if (cur->cmd_flags & REQ_FUA)
goto no_packed;
mmc_blk_clear_packed(mqrq);
max_blk_count = min(card->host->max_blk_count,
@ -2071,6 +2074,11 @@ static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
break;
}
if (next->cmd_flags & REQ_FUA) {
MMC_BLK_UPDATE_STOP_REASON(stats, FUA);
break;
}
if (rq_data_dir(cur) != rq_data_dir(next)) {
MMC_BLK_UPDATE_STOP_REASON(stats, WRONG_DATA_DIR);
break;

7
drivers/mmc/core/debugfs.c
View file

@ -531,6 +531,13 @@ static ssize_t mmc_wr_pack_stats_read(struct file *filp, char __user *ubuf,
pack_stats->pack_stop_reason[RANDOM]);
strlcat(ubuf, temp_buf, cnt);
}
if (pack_stats->pack_stop_reason[FUA]) {
snprintf(temp_buf, TEMP_BUF_SIZE,
"%s: %d times: fua request\n",
mmc_hostname(card->host),
pack_stats->pack_stop_reason[FUA]);
strlcat(ubuf, temp_buf, cnt);
}
spin_unlock(&pack_stats->lock);

1
include/linux/mmc/card.h
View file

@ -228,6 +228,7 @@ enum mmc_packed_stop_reasons {
THRESHOLD,
LARGE_SEC_ALIGN,
RANDOM,
FUA,
MAX_REASONS,
};