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[SCSI] sg: convert to kstrtoul_from_user()

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Instead of open coding this function use kstrtoul_from_user() directly.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Stephen Boyd 2012-01-10 15:42:34 -08:00 committed by James Bottomley
parent 466c08c71a
commit 7e95fffe08
1 changed files with 11 additions and 14 deletions
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25
drivers/scsi/sg.c
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@ -2368,16 +2368,15 @@ static ssize_t
sg_proc_write_adio(struct file *filp, const char __user *buffer,
size_t count, loff_t *off)
{
int num;
char buff[11];
int err;
unsigned long num;
if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
return -EACCES;
num = (count < 10) ? count : 10;
if (copy_from_user(buff, buffer, num))
return -EFAULT;
buff[num] = '\0';
sg_allow_dio = simple_strtoul(buff, NULL, 10) ? 1 : 0;
err = kstrtoul_from_user(buffer, count, 0, &num);
if (err)
return err;
sg_allow_dio = num ? 1 : 0;
return count;
}
@ -2390,17 +2389,15 @@ static ssize_t
sg_proc_write_dressz(struct file *filp, const char __user *buffer,
size_t count, loff_t *off)
{
int num;
int err;
unsigned long k = ULONG_MAX;
char buff[11];
if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
return -EACCES;
num = (count < 10) ? count : 10;
if (copy_from_user(buff, buffer, num))
return -EFAULT;
buff[num] = '\0';
k = simple_strtoul(buff, NULL, 10);
err = kstrtoul_from_user(buffer, count, 0, &k);
if (err)
return err;
if (k <= 1048576) { /* limit "big buff" to 1 MB */
sg_big_buff = k;
return count;