diff options
| author | Doug Anderson <dianders@chromium.org> | 2015-03-11 22:15:14 (GMT) |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2015-03-31 14:50:44 (GMT) |
| commit | b793f658b194edfe5e1d86aaeace01a7b03c68f9 (patch) | |
| tree | 6c332ac668a559850ead4ce9d3cb92992159a606 /drivers/mmc | |
| parent | 5c935165da79644df90a647ecc140fb77b40dee5 (diff) | |
| download | linux-b793f658b194edfe5e1d86aaeace01a7b03c68f9.tar.xz | |
mmc: dw_mmc: Don't try to enable the CD until we're sure we're not deferring
If dw_mci_init_slot() returns that we got a probe deferral then it may
leave slot->mmc as NULL. That will cause dw_mci_enable_cd() to crash
when it calls mmc_gpio_get_cd().
Fix this by moving the call of dw_mci_enable_cd() until we're sure
that we're good. Note that if we have more than one slot and one
defers (but the others don't) things won't work so well. ...but
that's not a new thing and everyone has already agreed that multislot
support ought to be removed from dw_mmc eventually anyway since it is
unused, untested, and you can see several bugs like this by inspecting
the code.
Fixes: bcafaf5470f0 ("mmc: dw_mmc: Only enable CD after setup and only if needed")
Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/dw_mmc.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index 8e0836d..3883fe6 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -2890,9 +2890,6 @@ int dw_mci_probe(struct dw_mci *host) init_slots++; } - /* Now that slots are all setup, we can enable card detect */ - dw_mci_enable_cd(host); - if (init_slots) { dev_info(host->dev, "%d slots initialized\n", init_slots); } else { @@ -2901,6 +2898,9 @@ int dw_mci_probe(struct dw_mci *host) goto err_dmaunmap; } + /* Now that slots are all setup, we can enable card detect */ + dw_mci_enable_cd(host); + if (host->quirks & DW_MCI_QUIRK_IDMAC_DTO) dev_info(host->dev, "Internal DMAC interrupt fix enabled.\n"); |