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authorKevin Liu <kliu5@marvell.com>2012-10-17 19:04:44 +0800
committerChris Ball <cjb@laptop.org>2012-11-07 15:02:04 -0500
commit657d59823c095e8f03e2744d765f53700331ff8f (patch)
tree33cb97164df514189cf478d4bcb7a327f2c0c856 /drivers/mmc/host/sdhci.c
parentee3298a2b6832bcfeec040dabf19632b704d826a (diff)
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>
Diffstat (limited to 'drivers/mmc/host/sdhci.c')
-rw-r--r--drivers/mmc/host/sdhci.c18
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index f05a37747b3..949e18c7c05 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);