diff options
| author | Doug Anderson <dianders@chromium.org> | 2015-02-25 10:11:52 -0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2015-03-23 14:13:31 +0100 |
| commit | ed2540effa70097f8e74aeaa83525dea7ccfc47a (patch) | |
| tree | 517d8da70fbccc97f8f77918617cf148d6c37e0b | |
| parent | fa0c328343c6314364d3678334f5a8854e086f11 (diff) | |
mmc: dw_mmc: Don't crash if we get an interrupt before slot has initted
It's unlikely that this is really needed on any single-slot systems
where we disable card detects until the end of probe, but it still
seems safer to check to make sure that a slot has been initted before
we try to dereference it to find the SDIO interrupt mask.
Signed-off-by: Doug Anderson <dianders@chromium.org>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| -rw-r--r-- | drivers/mmc/host/dw_mmc.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index a1c8f72ccc21..b46b825aaeb5 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -2217,6 +2217,10 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) /* Handle SDIO Interrupts */ for (i = 0; i < host->num_slots; i++) { struct dw_mci_slot *slot = host->slot[i]; + + if (!slot) + continue; + if (pending & SDMMC_INT_SDIO(slot->sdio_id)) { mci_writel(host, RINTSTS, SDMMC_INT_SDIO(slot->sdio_id)); |