From e8a9219e91619d4da3a8a440dd92009963fc59a9 Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Wed, 21 Aug 2024 20:36:03 +0200 Subject: [PATCH] wifi: wilc1000: Do not operate uninitialized hardware during suspend/resume MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit [ 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 Reviewed-by: Alexis Lothoré Signed-off-by: Kalle Valo Link: https://patch.msgid.link/20240821183639.163187-1-marex@denx.de Signed-off-by: Sasha Levin --- 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 0043f7a0fdf9..7999aeb76901 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);