ath6kl: add a timeout to ath6kl_hif_intr_bh_handler()

It's possible to busyloop forever in ath6kl_hif_intr_bh_handler(). Add
a check that it lasts only one second.

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

2 files changed, 5 insertions, 1 deletions

diff --git a/drivers/net/wireless/ath/ath6kl/hif.c b/drivers/net/wireless/ath/ath6kl/hif.c
index e2d808896b7f..309be9823e02 100644
--- a/drivers/net/wireless/ath/ath6kl/hif.c
+++ b/drivers/net/wireless/ath/ath6kl/hif.c
@@ -485,6 +485,7 @@ out:
 int ath6kl_hif_intr_bh_handler(struct ath6kl *ar)
 {
         struct ath6kl_device *dev = ar->htc_target->dev;
+        unsigned long timeout;
         int status = 0;
         bool done = false;
 
@@ -498,7 +499,8 @@ int ath6kl_hif_intr_bh_handler(struct ath6kl *ar)
          * IRQ processing is synchronous, interrupt status registers can be
          * re-read.
          */
-        while (!done) {
+        timeout = jiffies + msecs_to_jiffies(ATH6KL_HIF_COMMUNICATION_TIMEOUT);
+        while (time_before(jiffies, timeout) && !done) {
                 status = proc_pending_irqs(dev, &done);
                 if (status)
                         break;
diff --git a/drivers/net/wireless/ath/ath6kl/hif.h b/drivers/net/wireless/ath/ath6kl/hif.h
index ee7c31a4135a..78a6c79f8cab 100644
--- a/drivers/net/wireless/ath/ath6kl/hif.h
+++ b/drivers/net/wireless/ath/ath6kl/hif.h
@@ -69,6 +69,8 @@
 #define ATH6KL_MAX_TRANSFER_SIZE_PER_SCATTER      (16 * 1024)
 #define ATH6KL_SCATTER_REQS                       4
 
+#define ATH6KL_HIF_COMMUNICATION_TIMEOUT        1000
+
 struct bus_request {
         struct list_head list;