ssb: reset device only if it was enabled

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 22 insertions, 18 deletions

diff --git a/drivers/ssb/main.c b/drivers/ssb/main.c
index 06c0b6d5250d..e05ba6eefc7e 100644
--- a/drivers/ssb/main.c
+++ b/drivers/ssb/main.c
@@ -1226,27 +1226,31 @@ void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags)
                 return;
 
         reject = ssb_tmslow_reject_bitmask(dev);
-        ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK);
-        ssb_wait_bits(dev, SSB_TMSLOW, reject, 1000, 1);
-        ssb_wait_bits(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0);
 
-        if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
-                val = ssb_read32(dev, SSB_IMSTATE);
-                val |= SSB_IMSTATE_REJECT;
-                ssb_write32(dev, SSB_IMSTATE, val);
-                ssb_wait_bits(dev, SSB_IMSTATE, SSB_IMSTATE_BUSY, 1000, 0);
-        }
+        if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_CLOCK) {
+                ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK);
+                ssb_wait_bits(dev, SSB_TMSLOW, reject, 1000, 1);
+                ssb_wait_bits(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0);
+
+                if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
+                        val = ssb_read32(dev, SSB_IMSTATE);
+                        val |= SSB_IMSTATE_REJECT;
+                        ssb_write32(dev, SSB_IMSTATE, val);
+                        ssb_wait_bits(dev, SSB_IMSTATE, SSB_IMSTATE_BUSY, 1000,
+                                      0);
+                }
 
-        ssb_write32(dev, SSB_TMSLOW,
-                    SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
-                    reject | SSB_TMSLOW_RESET |
-                    core_specific_flags);
-        ssb_flush_tmslow(dev);
+                ssb_write32(dev, SSB_TMSLOW,
+                        SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
+                        reject | SSB_TMSLOW_RESET |
+                        core_specific_flags);
+                ssb_flush_tmslow(dev);
 
-        if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
-                val = ssb_read32(dev, SSB_IMSTATE);
-                val &= ~SSB_IMSTATE_REJECT;
-                ssb_write32(dev, SSB_IMSTATE, val);
+                if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
+                        val = ssb_read32(dev, SSB_IMSTATE);
+                        val &= ~SSB_IMSTATE_REJECT;
+                        ssb_write32(dev, SSB_IMSTATE, val);
+                }
         }
 
         ssb_write32(dev, SSB_TMSLOW,