On 4/28/2014 3:40 AM, Zhang Rui wrote:
On Mon, 2014-04-28 at 00:01 +0200, Rafael J. Wysocki wrote:
On Tuesday, April 08, 2014 12:06:49 AM Zhang Rui wrote:
[...]
+
+static int acpi_pnp_scan_handler_attach(struct acpi_device *adev,
+ const struct acpi_device_id *id)
+{
+ return 1;
+}
+
+static int acpi_pnp_scan_handler_match(char *devid, char *handlerid)
+{
+ int i;
+
+ if (memcmp(devid, handlerid, 3))
+ return 0;
+
+ for (i = 3; i < 7; i++) {
+ /* Not a HEX value */
+ if (!((devid[i] >= '0' && devid[i] <= '9') ||
+ (devid[i] > 'A' && devid[i] <= 'F')))
+ return 0;
+
+ if ((handlerid[i] != 'X') &&
Hmm. What exactly is the above check for?
PNP bus supports wildcard in the drivers' id list.
say, drivers/tty/serial/8250/8250_pnp.c
{"WACFXXX"}, /* Wacom tablets */
means the driver wants to try to probe all the PNP devices start with
"WACF".
I see. Maybe you can add a comment explaining this before that
statement, then?
Rafael
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
