diff options
| author | Wei WANG <wei_wang@realsil.com.cn> | 2013-01-27 01:55:16 +0100 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2013-01-27 02:18:07 +0100 |
| commit | 2d1484f5990c094e2c706672a8d286576dd096b4 (patch) | |
| tree | c818af028139077880e8f09d7164bcc8774c7e0c /drivers/mfd/rtsx_pcr.c | |
| parent | ff0decd49343c7c5bd0dbeadace344d69b9f205f (diff) | |
| download | linux-2d1484f5990c094e2c706672a8d286576dd096b4.tar.gz linux-2d1484f5990c094e2c706672a8d286576dd096b4.tar.bz2 linux-2d1484f5990c094e2c706672a8d286576dd096b4.zip | |
mfd: rtsx: Fix oops when rtsx_pci_sdmmc is not probed
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@realsil.com.cn>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/rtsx_pcr.c')
| -rw-r--r-- | drivers/mfd/rtsx_pcr.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/mfd/rtsx_pcr.c b/drivers/mfd/rtsx_pcr.c index 910200e10fa0..9fc57009e228 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); } |