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usb: misc: usbsevseg: Use sysfs_match_string() helper

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Use sysfs_match_string() helper instead of open coded variant.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2017-06-11 17:15:16 +03:00 committed by Greg Kroah-Hartman
parent d3be974a9c
commit 0bd08fc8db
1 changed files with 8 additions and 10 deletions
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18
drivers/usb/misc/usbsevseg.c
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@ -33,7 +33,7 @@ static const struct usb_device_id id_table[] = {
MODULE_DEVICE_TABLE(usb, id_table);
/* the different text display modes the device is capable of */
static char *display_textmodes[] = {"raw", "hex", "ascii", NULL};
static const char *display_textmodes[] = {"raw", "hex", "ascii"};
struct usb_sevsegdev {
struct usb_device *udev;
@ -280,7 +280,7 @@ static ssize_t show_attr_textmode(struct device *dev,
buf[0] = 0;
for (i = 0; display_textmodes[i]; i++) {
for (i = 0; i < ARRAY_SIZE(display_textmodes); i++) {
if (mydev->textmode == i) {
strcat(buf, " [");
strcat(buf, display_textmodes[i]);
@ -304,15 +304,13 @@ static ssize_t set_attr_textmode(struct device *dev,
struct usb_sevsegdev *mydev = usb_get_intfdata(intf);
int i;
for (i = 0; display_textmodes[i]; i++) {
if (sysfs_streq(display_textmodes[i], buf)) {
mydev->textmode = i;
update_display_visual(mydev, GFP_KERNEL);
return count;
}
}
i = sysfs_match_string(display_textmodes, buf);
if (i < 0)
return i;
return -EINVAL;
mydev->textmode = i;
update_display_visual(mydev, GFP_KERNEL);
return count;
}
static DEVICE_ATTR(textmode, S_IRUGO | S_IWUSR, show_attr_textmode, set_attr_textmode);