From: Marek Vasut marex@denx.de
[ Upstream commit b0dc7018477e8fbb7e40c908c29cf663d06b17a7 ]
In case the hardware is not initialized, do not operate it during suspend/resume cycle, the hardware is already off so there is no reason to access it.
In fact, wilc_sdio_enable_interrupt() in the resume callback does interfere with the same call when initializing the hardware after resume and makes such initialization after resume fail. Fix this by not operating uninitialized hardware during suspend/resume.
Signed-off-by: Marek Vasut marex@denx.de Reviewed-by: Alexis Lothoré alexis.lothore@bootlin.com Signed-off-by: Kalle Valo kvalo@kernel.org Link: https://patch.msgid.link/20240821183639.163187-1-marex@denx.de Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/microchip/wilc1000/sdio.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/drivers/net/wireless/microchip/wilc1000/sdio.c b/drivers/net/wireless/microchip/wilc1000/sdio.c index 0043f7a0fdf97..7999aeb76901f 100644 --- a/drivers/net/wireless/microchip/wilc1000/sdio.c +++ b/drivers/net/wireless/microchip/wilc1000/sdio.c @@ -977,6 +977,9 @@ static int wilc_sdio_suspend(struct device *dev)
dev_info(dev, "sdio suspend\n");
+ if (!wilc->initialized) + return 0; + if (!IS_ERR(wilc->rtc_clk)) clk_disable_unprepare(wilc->rtc_clk);
@@ -999,6 +1002,10 @@ static int wilc_sdio_resume(struct device *dev) struct wilc *wilc = sdio_get_drvdata(func);
dev_info(dev, "sdio resume\n"); + + if (!wilc->initialized) + return 0; + wilc_sdio_init(wilc, true); wilc_sdio_enable_interrupt(wilc);