Commit 8944d05f authored by Harald Freudenberger's avatar Harald Freudenberger Committed by Vasily Gorbik
Browse files

s390/ap: enable sysfs attribute scans to force AP bus rescan 



This patch switches the sysfs attribute /sys/bus/ap/scans
from read-only to read-write. If there is something written
to this attribute, an AP bus rescan is forced. If an AP
bus scan is triggered this way a debug feature entry line
reports this in /sys/kernel/debug/s390dbf/ap/sprintf.

Signed-off-by: default avatarHarald Freudenberger <freude@linux.ibm.com>
Reviewed-by: default avatarJakob Naucke <naucke@linux.ibm.com>
Reviewed-by: default avatarJuergen Christ <jchrist@linux.ibm.com>
Signed-off-by: default avatarVasily Gorbik <gor@linux.ibm.com>
parent 28391585

drivers/s390/crypto/ap_bus.c

+11 −1
Original line number Diff line number Diff line
@@ -1472,7 +1472,17 @@ static ssize_t scans_show(struct bus_type *bus, char *buf) 
			 atomic64_read(&ap_scan_bus_count));

}



static BUS_ATTR_RO(scans);

static ssize_t scans_store(struct bus_type *bus, const char *buf,

			   size_t count)

{

	AP_DBF_INFO("%s force AP bus rescan\n", __func__);



	ap_bus_force_rescan();



	return count;

}



static BUS_ATTR_RW(scans);



static ssize_t bindings_show(struct bus_type *bus, char *buf)

{