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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>
This commit is contained in:
Michal Kazior 2015-01-24 12:14:48 +02:00 committed by Kalle Valo
parent c545070e40
commit 1a7fecb766
1 changed files with 18 additions and 12 deletions
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30
drivers/net/wireless/ath/ath10k/pci.c
View File

@ -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);