r8152: Check for unplug in r8153b_ups_en() / r8153c_ups_en()

[ Upstream commit bc65cc42af737a5a35f83842408ef2c6c79ba025 ]

If the adapter is unplugged while we're looping in r8153b_ups_en() /
r8153c_ups_en() we could end up looping for 10 seconds (20 ms * 500
loops). Add code similar to what's done in other places in the driver
to check for unplug and bail.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 3cdb7ff..345e341 100644 (file)
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -3655,6 +3655,8 @@ static void r8153b_ups_en(struct r8152 *tp, bool enable)
                        int i;
 
                        for (i = 0; i < 500; i++) {
+                               if (test_bit(RTL8152_UNPLUG, &tp->flags))
+                                       return;
                                if (ocp_read_word(tp, MCU_TYPE_PLA, PLA_BOOT_CTRL) &
                                    AUTOLOAD_DONE)
                                        break;
@@ -3695,6 +3697,8 @@ static void r8153c_ups_en(struct r8152 *tp, bool enable)
                        int i;
 
                        for (i = 0; i < 500; i++) {
+                               if (test_bit(RTL8152_UNPLUG, &tp->flags))
+                                       return;
                                if (ocp_read_word(tp, MCU_TYPE_PLA, PLA_BOOT_CTRL) &
                                    AUTOLOAD_DONE)
                                        break;