Resets of the EG20T MAC on the MIPS Boston development board take longer
than the 1000 loops that pch_gbe_wait_clr_bit was performing. Rather
than simply increasing the number of loops, switch to using
readl_poll_timeout_atomic() from linux/iopoll.h in order to provide some
independence from the speed of the CPU.
Signed-off-by: Paul Burton <paul.burton@xxxxxxxxxx>
Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Eric Dumazet <edumazet@xxxxxxxxxx>
Cc: Jarod Wilson <jarod@xxxxxxxxxx>
Cc: Tobias Klauser <tklauser@xxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
Cc: netdev@xxxxxxxxxxxxxxx
---
Changes in v3:
- Switch to using readl_poll_timeout_atomic().
Changes in v2: None
drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c
index f8791be7b3b5..3d0f4c8b1742 100644
--- a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c
+++ b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c
@@ -24,6 +24,7 @@
#include <linux/ptp_classify.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
+#include <linux/iopoll.h>
#include <linux/of_gpio.h>
#define DRV_VERSION "1.01"
@@ -318,13 +319,11 @@ s32 pch_gbe_mac_read_mac_addr(struct pch_gbe_hw *hw)
*/
static void pch_gbe_wait_clr_bit(void *reg, u32 bit)
{
+ int err;
u32 tmp;
- /* wait busy */
- tmp = 1000;
- while ((ioread32(reg) & bit) && --tmp)
- cpu_relax();
- if (!tmp)
+ err = readl_poll_timeout_atomic(reg, tmp, !(tmp & bit), 10, 500);
+ if (err)
pr_err("Error: busy bit is not cleared\n");
}
--
2.13.0
