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| author | Chen-Yu Tsai <wens@csie.org> | 2016-05-29 15:04:42 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-06-02 10:39:05 +0200 |
| commit | f741494363c6c90e6744117d2771bbdf0fb3c455 (patch) | |
| tree | 631a6a08eebc95f150c797a44ea4714c7c6ea57e /drivers/mmc | |
| parent | 1a695a905c18548062509178b98bc91e67510864 (diff) | |
| download | linux-stable-f741494363c6c90e6744117d2771bbdf0fb3c455.tar.gz linux-stable-f741494363c6c90e6744117d2771bbdf0fb3c455.tar.bz2 linux-stable-f741494363c6c90e6744117d2771bbdf0fb3c455.zip | |
mmc: fix mmc mode selection for HS-DDR and higher
When IS_ERR_VALUE was removed from the mmc core code, it was replaced
with a simple not-zero check. This does not work, as the value checked
is the return value for mmc_select_bus_width, which returns the set
bit width on success. This made eMMC modes higher than HS-DDR unusable.
Fix this by checking for a positive return value instead.
Fixes: 287980e49ffc ("remove lots of IS_ERR_VALUE abuses")
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/core/mmc.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index c984321d1881..5d438ad3ee32 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -1276,7 +1276,7 @@ static int mmc_select_hs200(struct mmc_card *card) * switch to HS200 mode if bus width is set successfully. */ err = mmc_select_bus_width(card); - if (!err) { + if (err >= 0) { val = EXT_CSD_TIMING_HS200 | card->drive_strength << EXT_CSD_DRV_STR_SHIFT; err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, @@ -1583,7 +1583,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, } else if (mmc_card_hs(card)) { /* Select the desired bus width optionally */ err = mmc_select_bus_width(card); - if (!err) { + if (err >= 0) { err = mmc_select_hs_ddr(card); if (err) goto free_card; |