linux

iv/linux

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Miaoqing Pan af8262b5e1 ath9k: fix sleeping in atomic context

[ Upstream commit 7c48662b9d56666219f526a71ace8c15e6e12f1f ]

The problem is that gpio_free() can sleep and the cfg_soc() can be
called with spinlocks held. One problematic call tree is:

--> ath_reset_internal() takes &sc->sc_pcu_lock spin lock
   --> ath9k_hw_reset()
      --> ath9k_hw_gpio_request_in()
         --> ath9k_hw_gpio_request()
            --> ath9k_hw_gpio_cfg_soc()

Remove gpio_free(), use error message instead, so we should make sure
there is no GPIO conflict.

Also remove ath9k_hw_gpio_free() from ath9k_hw_apply_gpio_override(),
as gpio_mask will never be set for SOC chips.

Signed-off-by: Miaoqing Pan <miaoqing@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1628481916-15030-1-git-send-email-miaoqing@codeaurora.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

2021-09-22 11:43:08 +02:00

admtek

adm80211: add checks for dma mapping errors

2017-11-30 08:39:13 +00:00

ath

ath9k: fix sleeping in atomic context

2021-09-22 11:43:08 +02:00

atmel

at76c50x-usb: Don't register led_trigger if usb_register_driver failed

2019-05-31 06:48:13 -07:00

broadcom

brcmsmac: mac80211_if: Fix a resource leak in an error handling path