ahci: wait longer for link.

I have observed timeouts on a cubietruck.

The increase to 40ms is completely arbitrary and Works For Me(tm). I
couldn't find a good reference for how long you are supposed to wait,
although googling around it seems like tens of ms rather than single
digits is more common. I don't think there is any harm in waiting a bit
longer.

Signed-off-by: Ian Campbell <ijc@hellion.org.uk>

diff --git a/drivers/block/ahci.c b/drivers/block/ahci.c
index 22621bfb77dbb25ca227219e1d7f57ce968a0520..a409f63770473e5c3a83039d42e67ed5640a2363 100644 (file)
--- a/drivers/block/ahci.c
+++ b/drivers/block/ahci.c
@@ -41,7 +41,7 @@ u16 *ataid[AHCI_MAX_PORTS];
 #define WAIT_MS_SPINUP 20000
 #define WAIT_MS_DATAIO 5000
 #define WAIT_MS_FLUSH  5000
-#define WAIT_MS_LINKUP 4
+#define WAIT_MS_LINKUP 40
 
 static inline u32 ahci_port_base(u32 base, u32 port)
 {