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Commit 38fbb271 authored by Komal Seelam's avatar Komal Seelam Committed by Gerrit - the friendly Code Review server
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cnss: Reset QCA Card during WLAN SubSystem Recovery 



During SSR, we observe cases where card enter bad state and is not
responding to any I/O commands. To Fix it, functional driver needs
to power off and power on the card to bring back into active state.

CRs-Fixed: 1046397
Change-Id: Ia3ab2781c93d1cfe7427e2b1c2644f6628f6465f
Signed-off-by: default avatarKomal Seelam <kseelam@codeaurora.org>
parent 2a2d5ee0

drivers/net/wireless/cnss/cnss_sdio.c

+29 −7
Original line number Original line Diff line number Diff line
@@ -296,15 +296,25 @@ static int cnss_sdio_shutdown(const struct subsys_desc *subsys, bool force_stop) 
{

{

	struct cnss_sdio_info *cnss_info;

	struct cnss_sdio_info *cnss_info;

	struct cnss_sdio_wlan_driver *wdrv;

	struct cnss_sdio_wlan_driver *wdrv;

	int ret = 0;





	if (!cnss_pdata)

	if (!cnss_pdata)

		return -ENODEV;

		return -ENODEV;





	cnss_info = &cnss_pdata->cnss_sdio_info;

	cnss_info = &cnss_pdata->cnss_sdio_info;

	wdrv = cnss_info->wdrv;

	wdrv = cnss_info->wdrv;

	if (wdrv && wdrv->shutdown)

	if (!wdrv)

		wdrv->shutdown(cnss_info->func);

		return 0;

	if (!wdrv->shutdown)

		return 0;

		return 0;



	wdrv->shutdown(cnss_info->func);

	ret = cnss_put_hw_resources(cnss_info->dev);



	if (ret)

		pr_err("%s: Failed to put hw resources\n", __func__);



	return ret;

}

}





static int cnss_sdio_powerup(const struct subsys_desc *subsys)

static int cnss_sdio_powerup(const struct subsys_desc *subsys)
@@ -318,11 +328,23 @@ static int cnss_sdio_powerup(const struct subsys_desc *subsys) 




	cnss_info = &cnss_pdata->cnss_sdio_info;

	cnss_info = &cnss_pdata->cnss_sdio_info;

	wdrv = cnss_info->wdrv;

	wdrv = cnss_info->wdrv;

	if (wdrv && wdrv->reinit) {



	if (!wdrv)

		return 0;



	if (!wdrv->reinit)

		return 0;



	ret = cnss_get_hw_resources(cnss_info->dev);

	if (ret) {

		pr_err("%s: Failed to power up HW\n", __func__);

		return ret;

	}



	ret = wdrv->reinit(cnss_info->func, cnss_info->id);

	ret = wdrv->reinit(cnss_info->func, cnss_info->id);

	if (ret)

	if (ret)

		pr_err("%s: wlan reinit error=%d\n", __func__, ret);

		pr_err("%s: wlan reinit error=%d\n", __func__, ret);

	}



	return ret;

	return ret;

}

}