From: Johannes Berg <johannes.berg@xxxxxxxxx>
With unlimited pseudo-D3, we can get stuck here in the read if
the firmware never wakes up. All of our testing infrastructure
however will anyway give up after at most a minute, so there's
no value in that.
Limit this to about a minute to avoid getting stuck with the
RTNL held forever, which basically makes the machine unusable
and then we can't even understand what caused the failure.
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@xxxxxxxxx>
---
drivers/net/wireless/intel/iwlwifi/mvm/d3.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c
index 994387eac6f7..af449cb9f967 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c
@@ -3389,6 +3389,7 @@ static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct iwl_mvm *mvm = file->private_data;
+ unsigned long end = jiffies + 60 * HZ;
u32 pme_asserted;
while (true) {
@@ -3402,6 +3403,12 @@ static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
if (msleep_interruptible(100))
break;
+
+ if (time_is_before_jiffies(end)) {
+ IWL_ERR(mvm,
+ "ending pseudo-D3 with timeout after ~60 seconds\n");
+ return -ETIMEDOUT;
+ }
}
return 0;
--
2.34.1
