diff options
author | Kevin Hilman <khilman@linaro.org> | 2015-10-14 13:45:10 -0700 |
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committer | Kevin Hilman <khilman@linaro.org> | 2015-10-14 13:45:10 -0700 |
commit | 1ed1294c420b2899ff69ec48bdf29fd1b79f374c (patch) | |
tree | 3a35dbcb5805ff0991e6b3aee5411c4810bbc365 /block | |
parent | de5cfb5acd63d7f86bd60dc4a578519fe4831bca (diff) | |
parent | 575afa2b6b9b628766618f3da6c7289ab32f5661 (diff) |
Merge branch 'linux-linaro-lsk-v3.14' into linux-linaro-lsk-v3.14-android
Diffstat (limited to 'block')
-rw-r--r-- | block/blk-mq-sysfs.c | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c index b91ce75bd35d..d2102c4eefbf 100644 --- a/block/blk-mq-sysfs.c +++ b/block/blk-mq-sysfs.c @@ -141,15 +141,26 @@ static ssize_t blk_mq_sysfs_completed_show(struct blk_mq_ctx *ctx, char *page) static ssize_t sysfs_list_show(char *page, struct list_head *list, char *msg) { - char *start_page = page; struct request *rq; + int len = snprintf(page, PAGE_SIZE - 1, "%s:\n", msg); + + list_for_each_entry(rq, list, queuelist) { + const int rq_len = 2 * sizeof(rq) + 2; + + /* if the output will be truncated */ + if (PAGE_SIZE - 1 < len + rq_len) { + /* backspacing if it can't hold '\t...\n' */ + if (PAGE_SIZE - 1 < len + 5) + len -= rq_len; + len += snprintf(page + len, PAGE_SIZE - 1 - len, + "\t...\n"); + break; + } + len += snprintf(page + len, PAGE_SIZE - 1 - len, + "\t%p\n", rq); + } - page += sprintf(page, "%s:\n", msg); - - list_for_each_entry(rq, list, queuelist) - page += sprintf(page, "\t%p\n", rq); - - return page - start_page; + return len; } static ssize_t blk_mq_sysfs_rq_list_show(struct blk_mq_ctx *ctx, char *page) |