On Sat, 22 Aug 2020 at 08:15, <madhuparnabhowmik10@xxxxxxxxx> wrote:
>
> From: Madhuparna Bhowmik <madhuparnabhowmik10@xxxxxxxxx>
>
> via_save_pcictrlreg() should be called with host->lock held
> as it writes to pm_pcictrl_reg, otherwise there can be a race
> condition between via_sd_suspend() and via_sdc_card_detect().
> The same pattern is used in the function via_reset_pcictrl()
> as well, where via_save_pcictrlreg() is called with host->lock
> held.
>
> Found by Linux Driver Verification project (linuxtesting.org).
>
> Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@xxxxxxxxx>
Applied for next, thanks!
Kind regards
Uffe
> ---
> v2: Rebase v5.9-rc1
>
> drivers/mmc/host/via-sdmmc.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/mmc/host/via-sdmmc.c b/drivers/mmc/host/via-sdmmc.c
> index 49dab9f42b6d..9b755ea0fa03 100644
> --- a/drivers/mmc/host/via-sdmmc.c
> +++ b/drivers/mmc/host/via-sdmmc.c
> @@ -1257,11 +1257,14 @@ static void __maybe_unused via_init_sdc_pm(struct via_crdr_mmc_host *host)
> static int __maybe_unused via_sd_suspend(struct device *dev)
> {
> struct via_crdr_mmc_host *host;
> + unsigned long flags;
>
> host = dev_get_drvdata(dev);
>
> + spin_lock_irqsave(&host->lock, flags);
> via_save_pcictrlreg(host);
> via_save_sdcreg(host);
> + spin_unlock_irqrestore(&host->lock, flags);
>
> device_wakeup_enable(dev);
>
> --
> 2.17.1
>
