commit 4ea545d476d3182056aeb042c439237ed61d261e
author Stanislaw Gruszka <sgruszka@redhat.com> Wed Feb 13 14:27:05 2013 +0100
committer John W. Linville <linville@tuxdriver.com> Thu Feb 14 14:24:07 2013 -0500
tree a216861969701e1f48e64d829caf700966088980
parent 52301a815e81cdcbcf971ba28df0376dc7f3961c

rt2x00: check for dma mappings errors

Check output of dma_map_single functions which nowadays can fail (when
IOMMU is used). On write_beacon callbacks just print error, similar
like padding error is handled by rt2800_write_beacon.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2500pci.c

diff --git a/drivers/net/wireless/rt2x00/rt2500pci.c b/drivers/net/wireless/rt2x00/rt2500pci.c
index 9bea10f..39edc59 100644
--- a/drivers/net/wireless/rt2x00/rt2500pci.c
+++ b/drivers/net/wireless/rt2x00/rt2500pci.c
@@ -1338,7 +1338,10 @@
 	rt2x00_set_field32(&reg, CSR14_BEACON_GEN, 0);
 	rt2x00pci_register_write(rt2x00dev, CSR14, reg);
 
-	rt2x00queue_map_txskb(entry);
+	if (rt2x00queue_map_txskb(entry)) {
+		ERROR(rt2x00dev, "Fail to map beacon, aborting\n");
+		goto out;
+	}
 
 	/*
 	 * Write the TX descriptor for the beacon.
@@ -1349,7 +1352,7 @@
 	 * Dump beacon to userspace through debugfs.
 	 */
 	rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_BEACON, entry->skb);
-
+out:
 	/*
 	 * Enable beaconing again.
 	 */