* Re: Regulator API ignored return values
[not found] <201303112043.53334.arnd@arndb.de>
@ 2013-03-11 21:55 ` Chris Ball
0 siblings, 0 replies; only message in thread
From: Chris Ball @ 2013-03-11 21:55 UTC (permalink / raw)
To: Arnd Bergmann
Cc: linux-kernel, Stephen Warren, linux-arm-kernel, Mark Brown,
Linus Walleij, Axel Lin, Jingoo Han, Felipe Balbi,
Dmitry Torokhov, linux-mmc
Hi,
On Mon, Mar 11 2013, Arnd Bergmann wrote:
> ==> build/dove_defconfig/faillog <==
> /git/arm-soc/drivers/mmc/host/sdhci.c: In function 'sdhci_add_host':
> /git/arm-soc/drivers/mmc/host/sdhci.c:2910:19: warning: ignoring
> return value of 'regulator_enable', declared with attribute
> warn_unused_result [-Wunused-result]
Thanks, this looks like the right fix to me:
Subject: [PATCH] mmc: sdhci: Don't ignore regulator_enable() return value
Fixes:
/git/arm-soc/drivers/mmc/host/sdhci.c: In function 'sdhci_add_host':
/git/arm-soc/drivers/mmc/host/sdhci.c:2910:19: warning: ignoring
return value of 'regulator_enable', declared with attribute
warn_unused_result [-Wunused-result]
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
drivers/mmc/host/sdhci.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 51bbba4..fbf0b93 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2907,12 +2907,17 @@ int sdhci_add_host(struct sdhci_host *host)
host->vqmmc = NULL;
}
} else {
- regulator_enable(host->vqmmc);
+ ret = regulator_enable(host->vqmmc);
if (!regulator_is_supported_voltage(host->vqmmc, 1700000,
1950000))
caps[1] &= ~(SDHCI_SUPPORT_SDR104 |
SDHCI_SUPPORT_SDR50 |
SDHCI_SUPPORT_DDR50);
+ if (ret) {
+ pr_warn("%s: Failed to enable vqmmc regulator: %d\n",
+ mmc_hostname(mmc), ret);
+ host->vqmmc = NULL;
+ }
}
if (host->quirks2 & SDHCI_QUIRK2_NO_1_8_V)
--
Chris Ball <cjb@laptop.org> <http://printf.net/>
One Laptop Per Child
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