From: Ben Greear <greearb@xxxxxxxxxxxxxxx>
This works around a problem we see when sometimes the wifi NIC does
not respond the first time. This seems to happen especially often on
some of the 9984 NICs in mid-range platforms.
Signed-off-by: Ben Greear <greearb@xxxxxxxxxxxxxxx>
---
v2: Change to mdelay instead of udelay to fix compile issue on ARM.
drivers/net/wireless/ath/ath10k/pci.c | 20 ++++++++++++++++++--
1 file changed, 18 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c
index 77beb13..0861f7f 100644
--- a/drivers/net/wireless/ath/ath10k/pci.c
+++ b/drivers/net/wireless/ath/ath10k/pci.c
@@ -3487,8 +3487,8 @@ static const struct ath10k_bus_ops ath10k_pci_bus_ops = {
.get_num_banks = ath10k_pci_get_num_banks,
};
-static int ath10k_pci_probe(struct pci_dev *pdev,
- const struct pci_device_id *pci_dev)
+static int __ath10k_pci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *pci_dev)
{
int ret = 0;
struct ath10k *ar;
@@ -3672,6 +3672,22 @@ static int ath10k_pci_probe(struct pci_dev *pdev,
return ret;
}
+static int ath10k_pci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *pci_dev)
+{
+ int cnt = 0;
+ int rv;
+ do {
+ rv = __ath10k_pci_probe(pdev, pci_dev);
+ if (rv == 0)
+ return rv;
+ pr_err("ath10k: failed to probe PCI : %d, retry-count: %d\n", rv, cnt);
+ mdelay(10); /* let the ath10k firmware gerbil take a small break */
+ } while (cnt++ < 10);
+ return rv;
+}
+
+
static void ath10k_pci_remove(struct pci_dev *pdev)
{
struct ath10k *ar = pci_get_drvdata(pdev);
--
2.4.11
