diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-04-25 12:57:02 +0100 |
|---|---|---|
| committer | Chris Ball <chris@printf.net> | 2014-05-22 07:26:27 -0400 |
| commit | 5b4f1f6c496aa3a90b617d1319274bf2017e639d (patch) | |
| tree | 4279fce2c5cb6933873b6894ad36066c1a27e7f4 /drivers/mmc/host | |
| parent | b537f94ce19583de1882f539a5cc49aa99260aca (diff) | |
| download | linux-5b4f1f6c496aa3a90b617d1319274bf2017e639d.tar.bz2 | |
mmc: sdhci: plug hole in disabling card detection interrupts
When we disable card detection interrupts, we should disable both the
insert and remove interrupts irrespective of the current state - this
avoids races between the hardware card detect changing state before
we've read that updated state and altered the interrupt mask.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-by: Markus Pargmann <mpa@pengutronix.de>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <chris@printf.net>
Diffstat (limited to 'drivers/mmc/host')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 4a98ee29d136..8cd20ef0a9cb 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -133,20 +133,21 @@ static void sdhci_dumpregs(struct sdhci_host *host) static void sdhci_set_card_detection(struct sdhci_host *host, bool enable) { - u32 present, irqs; + u32 present; if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) || (host->mmc->caps & MMC_CAP_NONREMOVABLE)) return; - present = sdhci_readl(host, SDHCI_PRESENT_STATE) & - SDHCI_CARD_PRESENT; - irqs = present ? SDHCI_INT_CARD_REMOVE : SDHCI_INT_CARD_INSERT; + if (enable) { + present = sdhci_readl(host, SDHCI_PRESENT_STATE) & + SDHCI_CARD_PRESENT; - if (enable) - host->ier |= irqs; - else - host->ier &= ~irqs; + host->ier |= present ? SDHCI_INT_CARD_REMOVE : + SDHCI_INT_CARD_INSERT; + } else { + host->ier &= ~(SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT); + } sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); |