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 --- drivers/block/ahci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/block/ahci.c b/drivers/block/ahci.c index d5370fa..90a0719 100644 --- 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) {