diff options
Diffstat (limited to 'block/bfq-iosched.c')
| -rw-r--r-- | block/bfq-iosched.c | 52 |
1 files changed, 37 insertions, 15 deletions
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c index 856f4199a4700..0f286cd5da95d 100644 --- a/block/bfq-iosched.c +++ b/block/bfq-iosched.c @@ -4802,13 +4802,15 @@ static ssize_t bfq_var_show(unsigned int var, char *page) return sprintf(page, "%u\n", var); } -static void bfq_var_store(unsigned long *var, const char *page) +static int bfq_var_store(unsigned long *var, const char *page) { unsigned long new_val; int ret = kstrtoul(page, 10, &new_val); - if (ret == 0) - *var = new_val; + if (ret) + return ret; + *var = new_val; + return 0; } #define SHOW_FUNCTION(__FUNC, __VAR, __CONV) \ @@ -4849,8 +4851,12 @@ static ssize_t \ __FUNC(struct elevator_queue *e, const char *page, size_t count) \ { \ struct bfq_data *bfqd = e->elevator_data; \ - unsigned long uninitialized_var(__data); \ - bfq_var_store(&__data, (page)); \ + unsigned long __data; \ + int ret; \ + \ + ret = bfq_var_store(&__data, (page)); \ + if (ret) \ + return ret; \ if (__data < (MIN)) \ __data = (MIN); \ else if (__data > (MAX)) \ @@ -4877,8 +4883,12 @@ STORE_FUNCTION(bfq_slice_idle_store, &bfqd->bfq_slice_idle, 0, INT_MAX, 2); static ssize_t __FUNC(struct elevator_queue *e, const char *page, size_t count)\ { \ struct bfq_data *bfqd = e->elevator_data; \ - unsigned long uninitialized_var(__data); \ - bfq_var_store(&__data, (page)); \ + unsigned long __data; \ + int ret; \ + \ + ret = bfq_var_store(&__data, (page)); \ + if (ret) \ + return ret; \ if (__data < (MIN)) \ __data = (MIN); \ else if (__data > (MAX)) \ @@ -4894,9 +4904,12 @@ static ssize_t bfq_max_budget_store(struct elevator_queue *e, const char *page, size_t count) { struct bfq_data *bfqd = e->elevator_data; - unsigned long uninitialized_var(__data); + unsigned long __data; + int ret; - bfq_var_store(&__data, (page)); + ret = bfq_var_store(&__data, (page)); + if (ret) + return ret; if (__data == 0) bfqd->bfq_max_budget = bfq_calc_max_budget(bfqd); @@ -4919,9 +4932,12 @@ static ssize_t bfq_timeout_sync_store(struct elevator_queue *e, const char *page, size_t count) { struct bfq_data *bfqd = e->elevator_data; - unsigned long uninitialized_var(__data); + unsigned long __data; + int ret; - bfq_var_store(&__data, (page)); + ret = bfq_var_store(&__data, (page)); + if (ret) + return ret; if (__data < 1) __data = 1; @@ -4939,9 +4955,12 @@ static ssize_t bfq_strict_guarantees_store(struct elevator_queue *e, const char *page, size_t count) { struct bfq_data *bfqd = e->elevator_data; - unsigned long uninitialized_var(__data); + unsigned long __data; + int ret; - bfq_var_store(&__data, (page)); + ret = bfq_var_store(&__data, (page)); + if (ret) + return ret; if (__data > 1) __data = 1; @@ -4958,9 +4977,12 @@ static ssize_t bfq_low_latency_store(struct elevator_queue *e, const char *page, size_t count) { struct bfq_data *bfqd = e->elevator_data; - unsigned long uninitialized_var(__data); + unsigned long __data; + int ret; - bfq_var_store(&__data, (page)); + ret = bfq_var_store(&__data, (page)); + if (ret) + return ret; if (__data > 1) __data = 1; |