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author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-27 21:27:34 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-27 21:27:34 (GMT) |
commit | f23a5e1405e47df6cdc86568ea75df266b9e151f (patch) | |
tree | 788fab831a235ce8f143e8562d832336a595cff7 /kernel/pm_qos_params.c | |
parent | d24c2af42292cb4ad9c829d71fe0d795112ca6e7 (diff) | |
parent | 0775a60aca2375ea5598741b30d13fe6d3f15617 (diff) | |
download | linux-f23a5e1405e47df6cdc86568ea75df266b9e151f.tar.xz |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:
PM: Fix PM QOS's user mode interface to work with ASCII input
PM / Hibernate: Update kerneldoc comments in hibernate.c
PM / Hibernate: Remove arch_prepare_suspend()
PM / Hibernate: Update some comments in core hibernate code
Diffstat (limited to 'kernel/pm_qos_params.c')
-rw-r--r-- | kernel/pm_qos_params.c | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/kernel/pm_qos_params.c b/kernel/pm_qos_params.c index beb1846..fd8d1e0 100644 --- a/kernel/pm_qos_params.c +++ b/kernel/pm_qos_params.c @@ -40,6 +40,7 @@ #include <linux/string.h> #include <linux/platform_device.h> #include <linux/init.h> +#include <linux/kernel.h> #include <linux/uaccess.h> @@ -404,24 +405,36 @@ static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf, size_t count, loff_t *f_pos) { s32 value; - int x; - char ascii_value[11]; struct pm_qos_request_list *pm_qos_req; if (count == sizeof(s32)) { if (copy_from_user(&value, buf, sizeof(s32))) return -EFAULT; - } else if (count == 11) { /* len('0x12345678/0') */ - if (copy_from_user(ascii_value, buf, 11)) + } else if (count <= 11) { /* ASCII perhaps? */ + char ascii_value[11]; + unsigned long int ulval; + int ret; + + if (copy_from_user(ascii_value, buf, count)) return -EFAULT; - if (strlen(ascii_value) != 10) - return -EINVAL; - x = sscanf(ascii_value, "%x", &value); - if (x != 1) + + if (count > 10) { + if (ascii_value[10] == '\n') + ascii_value[10] = '\0'; + else + return -EINVAL; + } else { + ascii_value[count] = '\0'; + } + ret = strict_strtoul(ascii_value, 16, &ulval); + if (ret) { + pr_debug("%s, 0x%lx, 0x%x\n", ascii_value, ulval, ret); return -EINVAL; - pr_debug("%s, %d, 0x%x\n", ascii_value, x, value); - } else + } + value = (s32)lower_32_bits(ulval); + } else { return -EINVAL; + } pm_qos_req = filp->private_data; pm_qos_update_request(pm_qos_req, value); |