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authorDoug Anderson <dianders@chromium.org>2015-03-11 15:15:14 -0700
committerUlf Hansson <ulf.hansson@linaro.org>2015-03-31 16:50:44 +0200
commitb793f658b194edfe5e1d86aaeace01a7b03c68f9 (patch)
tree6c332ac668a559850ead4ce9d3cb92992159a606 /drivers/mmc
parent5c935165da79644df90a647ecc140fb77b40dee5 (diff)
downloadop-kernel-dev-b793f658b194edfe5e1d86aaeace01a7b03c68f9.zip
op-kernel-dev-b793f658b194edfe5e1d86aaeace01a7b03c68f9.tar.gz
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.c6
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");
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