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mmc: sdhci-of-esdhc: fix quirk to ignore command inhibit for data

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[ Upstream commit 0dd8316037 ]

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: 1f1929f3f2 ("mmc: sdhci-of-esdhc: add quirk to ignore command inhibit for data")
Signed-off-by: Georgii Kruglov <georgy.kruglov@yandex.ru>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20230321203715.3975-1-georgy.kruglov@yandex.ru
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Georgii Kruglov
2023-03-21 23:37:15 +03:00
committed by Greg Kroah-Hartman
parent 1975bf0259
commit 98893ae40b
1 changed files with 11 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/mmc/host/sdhci-of-esdhc.c
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@@ -126,6 +126,7 @@ static u32 esdhc_readl_fixup(struct sdhci_host *host,
return ret; return ret;
} }
} }
/* /*
* The DAT[3:0] line signal levels and the CMD line signal level are * The DAT[3:0] line signal levels and the CMD line signal level are
* not compatible with standard SDHC register. The line signal levels * not compatible with standard SDHC register. The line signal levels
@@ -137,6 +138,16 @@ static u32 esdhc_readl_fixup(struct sdhci_host *host,
ret = value & 0x000fffff; ret = value & 0x000fffff;
ret |= (value >> 4) & SDHCI_DATA_LVL_MASK; ret |= (value >> 4) & SDHCI_DATA_LVL_MASK;
ret |= (value << 1) & SDHCI_CMD_LVL; 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; return ret;
} }
@@ -151,19 +162,6 @@ static u32 esdhc_readl_fixup(struct sdhci_host *host,
return ret; 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; ret = value;
return ret; return ret;
} }