s390/sclp: Allow to request adapter reset

The SCLP event 24 "Adapter Error Notification" supports three different
action qualifier of which 'adapter reset' is currently not enabled in
the sysfs interface. However, userspace tools might want to be able
to use the reset functionality as well. Enable the 'adapter reset'
qualifier.

Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
Reviewed-by: Sebastian Ott <sebott@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/include/asm/sclp.h

@@ -95,6 +95,7 @@ extern struct sclp_info sclp;
 struct zpci_report_error_header {
 	u8 version;	/* Interface version byte */
 	u8 action;	/* Action qualifier byte
+			 * 0: Adapter Reset Request
 			 * 1: Deconfigure and repair action requested
 			 *	(OpenCrypto Problem Call Home)
 			 * 2: Informational Report

drivers/s390/char/sclp_pci.c

@@ -24,6 +24,7 @@
 
 #define SCLP_ATYPE_PCI				2
 
+#define SCLP_ERRNOTIFY_AQ_RESET			0
 #define SCLP_ERRNOTIFY_AQ_REPAIR		1
 #define SCLP_ERRNOTIFY_AQ_INFO_LOG		2
 
@@ -111,9 +112,14 @@ static int sclp_pci_check_report(struct zpci_report_error_header *report)
 	if (report->version != 1)
 		return -EINVAL;
 
-	if (report->action != SCLP_ERRNOTIFY_AQ_REPAIR &&
-	    report->action != SCLP_ERRNOTIFY_AQ_INFO_LOG)
+	switch (report->action) {
+	case SCLP_ERRNOTIFY_AQ_RESET:
+	case SCLP_ERRNOTIFY_AQ_REPAIR:
+	case SCLP_ERRNOTIFY_AQ_INFO_LOG:
+		break;
+	default:
 		return -EINVAL;
+	}
 
 	if (report->length > (PAGE_SIZE - sizeof(struct err_notify_sccb)))
 		return -EINVAL;