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| author | Michal Kazior <michal.kazior@tieto.com> | 2015-01-24 12:14:48 +0200 |
|---|---|---|
| committer | Kalle Valo <kvalo@qca.qualcomm.com> | 2015-01-27 15:59:27 +0200 |
| commit | 1a7fecb766c83dace747f42b25bbb544b00a0163 (patch) | |
| tree | 777cc850b3cb9b4917fd5fb4e832eff5efa260a0 /drivers/net/wireless/ath/ath10k/pci.c | |
| parent | c545070e404bfb20e5b72ae725332fe512e5d22c (diff) | |
| download | lwn-1a7fecb766c83dace747f42b25bbb544b00a0163.tar.gz lwn-1a7fecb766c83dace747f42b25bbb544b00a0163.zip | |
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>
Diffstat (limited to 'drivers/net/wireless/ath/ath10k/pci.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath10k/pci.c | 30 |
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 b98354c004f5..e0c9f4633a82 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); |