From 0dd8316037a2a6d85b2be208bef9991de7b42170 Mon Sep 17 00:00:00 2001 From: Georgii Kruglov Date: Tue, 21 Mar 2023 23:37:15 +0300 Subject: [PATCH] mmc: sdhci-of-esdhc: fix quirk to ignore command inhibit for data If spec_reg is equal to 'SDHCI_PRESENT_STATE', esdhc_readl_fixup() fixes up register value and returns it immediately. As a result, the further block (spec_reg == SDHCI_PRESENT_STATE) &&(esdhc->quirk_ignore_data_inhibit == true), is never executed. The patch merges the second block into the first one. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: 1f1929f3f2fa ("mmc: sdhci-of-esdhc: add quirk to ignore command inhibit for data") Signed-off-by: Georgii Kruglov Acked-by: Adrian Hunter Link: https://lore.kernel.org/r/20230321203715.3975-1-georgy.kruglov@yandex.ru Signed-off-by: Ulf Hansson --- drivers/mmc/host/sdhci-of-esdhc.c | 24 +++++++++++------------- 1 file changed, 11 insertions(+), 13 deletions(-) diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c index 4712ada..48ca1cf 100644 --- a/drivers/mmc/host/sdhci-of-esdhc.c +++ b/drivers/mmc/host/sdhci-of-esdhc.c @@ -133,6 +133,7 @@ static u32 esdhc_readl_fixup(struct sdhci_host *host, return ret; } } + /* * The DAT[3:0] line signal levels and the CMD line signal level are * not compatible with standard SDHC register. The line signal levels @@ -144,6 +145,16 @@ static u32 esdhc_readl_fixup(struct sdhci_host *host, ret = value & 0x000fffff; ret |= (value >> 4) & SDHCI_DATA_LVL_MASK; ret |= (value << 1) & SDHCI_CMD_LVL; + + /* + * Some controllers have unreliable Data Line Active + * bit for commands with busy signal. This affects + * Command Inhibit (data) bit. Just ignore it since + * MMC core driver has already polled card status + * with CMD13 after any command with busy siganl. + */ + if (esdhc->quirk_ignore_data_inhibit) + ret &= ~SDHCI_DATA_INHIBIT; return ret; } @@ -158,19 +169,6 @@ static u32 esdhc_readl_fixup(struct sdhci_host *host, return ret; } - /* - * Some controllers have unreliable Data Line Active - * bit for commands with busy signal. This affects - * Command Inhibit (data) bit. Just ignore it since - * MMC core driver has already polled card status - * with CMD13 after any command with busy siganl. - */ - if ((spec_reg == SDHCI_PRESENT_STATE) && - (esdhc->quirk_ignore_data_inhibit == true)) { - ret = value & ~SDHCI_DATA_INHIBIT; - return ret; - } - ret = value; return ret; } -- 2.7.4