diff options
| author | Andy Shevchenko <andy.shevchenko@gmail.com> | 2010-07-22 11:58:47 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-10 14:35:42 -0700 |
| commit | 8156d158efa6370a8183f47327f122edbb4f2cb6 (patch) | |
| tree | 45bde43e18dccb98ab8180c763515c08b825560a /drivers/usb/gadget | |
| parent | 787f4e5adaabba01becd646818dbace2d7e6b386 (diff) | |
usb: gadget: storage: strict coversion of 'ro' parameter
Bring a strict way to get the 'ro' parameter from the user.
The patch followed by this one adds another boolean parameter. To be consistent
Michał Nazarewicz proposed to use simple_strtol() in both cases (correspondend
discussion in LKML [1]). Due to simple_strtol() doesn't return error in a good
way and we have a boolean parameter the strict_strtoul() is used.
[1] http://lkml.org/lkml/2010/7/14/169
Signed-off-by: Andy Shevchenko <ext-andriy.shevchenko@nokia.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/gadget')
| -rw-r--r-- | drivers/usb/gadget/storage_common.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/usb/gadget/storage_common.c b/drivers/usb/gadget/storage_common.c index a10faecfabc..3bbddab72e5 100644 --- a/drivers/usb/gadget/storage_common.c +++ b/drivers/usb/gadget/storage_common.c @@ -748,9 +748,9 @@ static ssize_t fsg_store_ro(struct device *dev, struct device_attribute *attr, ssize_t rc = count; struct fsg_lun *curlun = fsg_lun_from_dev(dev); struct rw_semaphore *filesem = dev_get_drvdata(dev); - int i; + unsigned long ro; - if (sscanf(buf, "%d", &i) != 1) + if (strict_strtoul(buf, 2, &ro)) return -EINVAL; /* @@ -762,8 +762,8 @@ static ssize_t fsg_store_ro(struct device *dev, struct device_attribute *attr, LDBG(curlun, "read-only status change prevented\n"); rc = -EBUSY; } else { - curlun->ro = !!i; - curlun->initially_ro = !!i; + curlun->ro = ro; + curlun->initially_ro = ro; LDBG(curlun, "read-only status set to %d\n", curlun->ro); } up_read(filesem); |