rt2x00: fix clk_get call

clk_get() takes two arguments and might return ERR_PTR(), so we
have to nullify pointer on that case, to do not break further call
to clk_get_rate().

Reported-by: Felix Fietkau <nbd@nbd.name>
Fixes: 34db70b92fae ("rt2x00: add copy of clk for soc devices")
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/link.h b/link.h
index 67ec433..f201e8c 100644
--- a/link.h
+++ b/link.h
@@ -6,6 +6,10 @@
 #include <linux/ethtool.h>
 #include <linux/wireless.h>
 
+#ifndef SPEED_UNKNOWN
+#define SPEED_UNKNOWN           -1
+#endif
+
 #include "built_in.h"
 
 extern int wireless_sigqual(const char *ifname, struct iw_statistics *stats);