From: Wei WANG <wei_wang@xxxxxxxxxxxxxx> If rtsx_pci_sdmmc is not probed, function pointer pcr->slots[].card_event will point to NULL, and thus rtsx_pci_card_detect will reference a NULL pointer. Check card_event pointer before referencing it can avoid kernel panic. Signed-off-by: Wei WANG <wei_wang@xxxxxxxxxxxxxx> --- drivers/mfd/rtsx_pcr.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/mfd/rtsx_pcr.c b/drivers/mfd/rtsx_pcr.c index 910200e..9fc5700 100644 --- a/drivers/mfd/rtsx_pcr.c +++ b/drivers/mfd/rtsx_pcr.c @@ -786,10 +786,10 @@ static void rtsx_pci_card_detect(struct work_struct *work) spin_unlock_irqrestore(&pcr->lock, flags); - if (card_detect & SD_EXIST) + if ((card_detect & SD_EXIST) && pcr->slots[RTSX_SD_CARD].card_event) pcr->slots[RTSX_SD_CARD].card_event( pcr->slots[RTSX_SD_CARD].p_dev); - if (card_detect & MS_EXIST) + if ((card_detect & MS_EXIST) && pcr->slots[RTSX_MS_CARD].card_event) pcr->slots[RTSX_MS_CARD].card_event( pcr->slots[RTSX_MS_CARD].p_dev); } -- 1.7.9.5 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
