diff options
| author | Janusz Krzysztofik <jmkrzyszt@gmail.com> | 2018-10-12 21:09:01 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2018-10-15 16:26:00 +0200 |
| commit | 9c9f1ddee729846506b5d671ef5084f6e16dd1d1 (patch) | |
| tree | 7fbc7a0a4900dcb0646227ccc7563a675c615856 /drivers/mmc/core | |
| parent | a7c0b4b80f02d748031c785e30d380cfa7fd41ee (diff) | |
| download | linux-9c9f1ddee729846506b5d671ef5084f6e16dd1d1.tar.bz2 | |
mmc: pwrseq_simple: Fix incorrect handling of GPIO bitmap
Commit b9762bebc633 ("gpiolib: Pass bitmaps, not integer arrays, to
get/set array") changed the way GPIO values are passed to
gpiod_get/set_array_value() and friends. The new code introduced into
mmc_pwrseq_simple_set_gpios_value() incorrectly interpretes the 'value'
argument as a bitmap of GPIO values and assigns it directly to the
'values' bitmap variable passed to gpiod_set_array_value_cansleep()
instead of filling that bitmap with bits equal to the 'value' argument.
As a result, only member 0 of the array is handled correctly.
Moreover, wrong assumption is taken about the 'values' bitmap size not
exceding the number of bits of the 'value' argument type.
Fix it.
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/mmc/core')
| -rw-r--r-- | drivers/mmc/core/pwrseq_simple.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/mmc/core/pwrseq_simple.c b/drivers/mmc/core/pwrseq_simple.c index 7f882a2bb872..ece34c734693 100644 --- a/drivers/mmc/core/pwrseq_simple.c +++ b/drivers/mmc/core/pwrseq_simple.c @@ -40,13 +40,22 @@ static void mmc_pwrseq_simple_set_gpios_value(struct mmc_pwrseq_simple *pwrseq, struct gpio_descs *reset_gpios = pwrseq->reset_gpios; if (!IS_ERR(reset_gpios)) { - DECLARE_BITMAP(values, BITS_PER_TYPE(value)); + unsigned long *values; int nvalues = reset_gpios->ndescs; - values[0] = value; + values = bitmap_alloc(nvalues, GFP_KERNEL); + if (!values) + return; + + if (value) + bitmap_fill(values, nvalues); + else + bitmap_zero(values, nvalues); gpiod_set_array_value_cansleep(nvalues, reset_gpios->desc, reset_gpios->info, values); + + kfree(values); } } |