diff options
| author | Kevin Liu <kliu5@marvell.com> | 2012-10-17 19:04:44 +0800 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2012-11-07 15:02:04 -0500 |
| commit | 657d59823c095e8f03e2744d765f53700331ff8f (patch) | |
| tree | 33cb97164df514189cf478d4bcb7a327f2c0c856 | |
| parent | ee3298a2b6832bcfeec040dabf19632b704d826a (diff) | |
| download | linux-balancenuma-657d59823c095e8f03e2744d765f53700331ff8f.tar.gz | |
mmc: sdhci: fix IS_ERR() checking of regulator_get()
There are two problems here:
The check for vmmc was printing an unnecessary pr_info() when
host->vmmc is NULL.
The intent of the check for vqmmc was to only remove UHS if we have a
regulator that doesn't support the required voltage, but since IS_ERR()
doesn't catch NULL, we were actually removing UHS modes if vqmmc isn't
present at all -- since it isn't present for most users, this breaks
UHS for them. This patch fixes that UHS regression in 3.7-rc1.
Signed-off-by: Kevin Liu <kliu5@marvell.com>
Signed-off-by: Bin Wang <binw@marvell.com>
Reviewed-by: Philip Rakity <prakity@marvell.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index f05a37747b3d4..949e18c7c05dd 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2849,9 +2849,12 @@ int sdhci_add_host(struct sdhci_host *host) /* If vqmmc regulator and no 1.8V signalling, then there's no UHS */ host->vqmmc = regulator_get(mmc_dev(mmc), "vqmmc"); - if (IS_ERR(host->vqmmc)) { - pr_info("%s: no vqmmc regulator found\n", mmc_hostname(mmc)); - host->vqmmc = NULL; + if (IS_ERR_OR_NULL(host->vqmmc)) { + if (PTR_ERR(host->vqmmc) < 0) { + pr_info("%s: no vqmmc regulator found\n", + mmc_hostname(mmc)); + host->vqmmc = NULL; + } } else if (regulator_is_supported_voltage(host->vqmmc, 1800000, 1800000)) regulator_enable(host->vqmmc); @@ -2907,9 +2910,12 @@ int sdhci_add_host(struct sdhci_host *host) ocr_avail = 0; host->vmmc = regulator_get(mmc_dev(mmc), "vmmc"); - if (IS_ERR(host->vmmc)) { - pr_info("%s: no vmmc regulator found\n", mmc_hostname(mmc)); - host->vmmc = NULL; + if (IS_ERR_OR_NULL(host->vmmc)) { + if (PTR_ERR(host->vmmc) < 0) { + pr_info("%s: no vmmc regulator found\n", + mmc_hostname(mmc)); + host->vmmc = NULL; + } } else regulator_enable(host->vmmc); |