lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Fri, 22 Mar 2019 16:43:54 +0100 From: Arnd Bergmann <arnd@...db.de> To: stable@...r.kernel.org, Ulf Hansson <ulf.hansson@...aro.org>, Janusz Krzysztofik <jmkrzyszt@...il.com>, Linus Walleij <linus.walleij@...aro.org>, Geert Uytterhoeven <geert+renesas@...der.be>, "Tobin C. Harding" <me@...in.cc> Cc: Martin Fuzzey <mfuzzey@...keon.com>, Tony Lindgren <tony@...mide.com>, Arnd Bergmann <arnd@...db.de>, linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [BACKPORT 4.4.y 03/25] mmc: pwrseq_simple: Make reset-gpios optional to match doc From: Martin Fuzzey <mfuzzey@...keon.com> The DT binding doc says reset-gpios is an optional property but the code currently bails out if it is omitted. This is a regression since it breaks previously working device trees. Fix it by restoring the original documented behaviour. Fixes: ce037275861e ("mmc: pwrseq_simple: use GPIO descriptors array API") Tested-by: Tony Lindgren <tony@...mide.com> Signed-off-by: Martin Fuzzey <mfuzzey@...keon.com> Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org> (cherry picked from commit 64a67d4762ce3ce4c9466eadd152d825fbf84967) Signed-off-by: Arnd Bergmann <arnd@...db.de> --- drivers/mmc/core/pwrseq_simple.c | 22 ++++++++++++++-------- 1 file changed, 14 insertions(+), 8 deletions(-) diff --git a/drivers/mmc/core/pwrseq_simple.c b/drivers/mmc/core/pwrseq_simple.c index 2b16263458af..aba786daebca 100644 --- a/drivers/mmc/core/pwrseq_simple.c +++ b/drivers/mmc/core/pwrseq_simple.c @@ -29,15 +29,18 @@ struct mmc_pwrseq_simple { static void mmc_pwrseq_simple_set_gpios_value(struct mmc_pwrseq_simple *pwrseq, int value) { - int i; struct gpio_descs *reset_gpios = pwrseq->reset_gpios; - int values[reset_gpios->ndescs]; - for (i = 0; i < reset_gpios->ndescs; i++) - values[i] = value; + if (!IS_ERR(reset_gpios)) { + int i; + int values[reset_gpios->ndescs]; - gpiod_set_array_value_cansleep(reset_gpios->ndescs, reset_gpios->desc, - values); + for (i = 0; i < reset_gpios->ndescs; i++) + values[i] = value; + + gpiod_set_array_value_cansleep( + reset_gpios->ndescs, reset_gpios->desc, values); + } } static void mmc_pwrseq_simple_pre_power_on(struct mmc_host *host) @@ -79,7 +82,8 @@ static void mmc_pwrseq_simple_free(struct mmc_host *host) struct mmc_pwrseq_simple *pwrseq = container_of(host->pwrseq, struct mmc_pwrseq_simple, pwrseq); - gpiod_put_array(pwrseq->reset_gpios); + if (!IS_ERR(pwrseq->reset_gpios)) + gpiod_put_array(pwrseq->reset_gpios); if (!IS_ERR(pwrseq->ext_clk)) clk_put(pwrseq->ext_clk); @@ -112,7 +116,9 @@ struct mmc_pwrseq *mmc_pwrseq_simple_alloc(struct mmc_host *host, } pwrseq->reset_gpios = gpiod_get_array(dev, "reset", GPIOD_OUT_HIGH); - if (IS_ERR(pwrseq->reset_gpios)) { + if (IS_ERR(pwrseq->reset_gpios) && + PTR_ERR(pwrseq->reset_gpios) != -ENOENT && + PTR_ERR(pwrseq->reset_gpios) != -ENOSYS) { ret = PTR_ERR(pwrseq->reset_gpios); goto clk_put; } -- 2.20.0
Powered by blists - more mailing lists