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authorMichal Kazior <michal.kazior@tieto.com>2015-01-24 12:14:48 +0200
committerKalle Valo <kvalo@qca.qualcomm.com>2015-01-27 15:59:27 +0200
commit1a7fecb766c83dace747f42b25bbb544b00a0163 (patch)
tree777cc850b3cb9b4917fd5fb4e832eff5efa260a0
parentc545070e404bfb20e5b72ae725332fe512e5d22c (diff)
downloadop-kernel-dev-1a7fecb766c83dace747f42b25bbb544b00a0163.zip
op-kernel-dev-1a7fecb766c83dace747f42b25bbb544b00a0163.tar.gz
ath10k: reset chip before reading chip_id in probe
There are some very rare cases with some hardware configuration that the device doesn't init quickly enough in which case reading chip_id yielded 0. This caused driver to subsequently fail to setup the device. Signed-off-by: Michal Kazior <michal.kazior@tieto.com> Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
-rw-r--r--drivers/net/wireless/ath/ath10k/pci.c30
1 files changed, 18 insertions, 12 deletions
diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c
index b98354c..e0c9f46 100644
--- a/drivers/net/wireless/ath/ath10k/pci.c
+++ b/drivers/net/wireless/ath/ath10k/pci.c
@@ -2544,18 +2544,6 @@ static int ath10k_pci_probe(struct pci_dev *pdev,
goto err_release;
}
- chip_id = ath10k_pci_soc_read32(ar, SOC_CHIP_ID_ADDRESS);
- if (chip_id == 0xffffffff) {
- ath10k_err(ar, "failed to get chip id\n");
- goto err_sleep;
- }
-
- if (!ath10k_pci_chip_is_supported(pdev->device, chip_id)) {
- ath10k_err(ar, "device %04x with chip_id %08x isn't supported\n",
- pdev->device, chip_id);
- goto err_sleep;
- }
-
ret = ath10k_pci_alloc_pipes(ar);
if (ret) {
ath10k_err(ar, "failed to allocate copy engine pipes: %d\n",
@@ -2582,6 +2570,24 @@ static int ath10k_pci_probe(struct pci_dev *pdev,
goto err_deinit_irq;
}
+ ret = ath10k_pci_chip_reset(ar);
+ if (ret) {
+ ath10k_err(ar, "failed to reset chip: %d\n", ret);
+ goto err_free_irq;
+ }
+
+ chip_id = ath10k_pci_soc_read32(ar, SOC_CHIP_ID_ADDRESS);
+ if (chip_id == 0xffffffff) {
+ ath10k_err(ar, "failed to get chip id\n");
+ goto err_free_irq;
+ }
+
+ if (!ath10k_pci_chip_is_supported(pdev->device, chip_id)) {
+ ath10k_err(ar, "device %04x with chip_id %08x isn't supported\n",
+ pdev->device, chip_id);
+ goto err_sleep;
+ }
+
ath10k_pci_sleep(ar);
ret = ath10k_core_register(ar, chip_id);
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