diff options
| author | Veerabhadrarao Badiganti <vbadigan@codeaurora.org> | 2020-07-09 16:13:25 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2020-07-13 13:18:26 +0300 |
| commit | 3debc24f7fe637ebefbaa3d37aeecb33a69bde11 (patch) | |
| tree | a23cf01719ea360c9ab5b214ff292189a2535c74 /drivers/mmc | |
| parent | ec02760b63c21c439d44956e9c66d0af24011f03 (diff) | |
| download | linux-3debc24f7fe637ebefbaa3d37aeecb33a69bde11.tar.xz | |
mmc: sdhci: Fix potential null pointer access while accessing vqmmc
Don't access vqmmc regulator handler, if it's already invalidated.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Veerabhadrarao Badiganti <vbadigan@codeaurora.org>
Link: https://lore.kernel.org/r/1594300408-17658-1-git-send-email-vbadigan@codeaurora.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index e6275c2202b0..d3b62fc5c661 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -4383,11 +4383,6 @@ int sdhci_setup_host(struct sdhci_host *host) if (!IS_ERR(mmc->supply.vqmmc)) { if (enable_vqmmc) { ret = regulator_enable(mmc->supply.vqmmc); - if (ret) { - pr_warn("%s: Failed to enable vqmmc regulator: %d\n", - mmc_hostname(mmc), ret); - mmc->supply.vqmmc = ERR_PTR(-EINVAL); - } host->sdhci_core_to_disable_vqmmc = !ret; } @@ -4402,6 +4397,13 @@ int sdhci_setup_host(struct sdhci_host *host) if (!regulator_is_supported_voltage(mmc->supply.vqmmc, 2700000, 3600000)) host->flags &= ~SDHCI_SIGNALING_330; + + if (ret) { + pr_warn("%s: Failed to enable vqmmc regulator: %d\n", + mmc_hostname(mmc), ret); + mmc->supply.vqmmc = ERR_PTR(-EINVAL); + } + } if (host->quirks2 & SDHCI_QUIRK2_NO_1_8_V) { |