diff options
| author | Stanley Chu <stanley.chu@mediatek.com> | 2020-01-29 18:52:50 +0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-02-10 22:46:54 -0500 |
| commit | 5a244e0ea67b293abb1d26c825db2ddde5f2862f (patch) | |
| tree | 03abcec95b371559e6554380599f3bb4362357dd | |
| parent | 2a06ff207445ddb7aa643751f85c54e7e3895fb4 (diff) | |
| download | linux-5a244e0ea67b293abb1d26c825db2ddde5f2862f.tar.bz2 | |
scsi: ufs: fix Auto-Hibern8 error detection
Auto-Hibern8 may be disabled by some vendors or sysfs in runtime even if
Auto-Hibern8 capability is supported by host. If Auto-Hibern8 capability is
supported by host but not actually enabled, Auto-Hibern8 error shall not
happen.
To fix this, provide a way to detect if Auto-Hibern8 is actually enabled
first, and bypass Auto-Hibern8 disabling case in
ufshcd_is_auto_hibern8_error().
Fixes: 821744403913 ("scsi: ufs: Add error-handling of Auto-Hibernate")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200129105251.12466-4-stanley.chu@mediatek.com
Reviewed-by: Bean Huo <beanhuo@micron.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Asutosh Das <asutoshd@codeaurora.org>
Reviewed-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.c | 3 | ||||
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.h | 6 |
2 files changed, 8 insertions, 1 deletions
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index abd0e6b05f79..214a3f373dd8 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -5479,7 +5479,8 @@ static irqreturn_t ufshcd_update_uic_error(struct ufs_hba *hba) static bool ufshcd_is_auto_hibern8_error(struct ufs_hba *hba, u32 intr_mask) { - if (!ufshcd_is_auto_hibern8_supported(hba)) + if (!ufshcd_is_auto_hibern8_supported(hba) || + !ufshcd_is_auto_hibern8_enabled(hba)) return false; if (!(intr_mask & UFSHCD_UIC_HIBERN8_MASK)) diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 2ae6c7c8528c..81c71a3e3474 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -55,6 +55,7 @@ #include <linux/clk.h> #include <linux/completion.h> #include <linux/regulator/consumer.h> +#include <linux/bitfield.h> #include "unipro.h" #include <asm/irq.h> @@ -773,6 +774,11 @@ static inline bool ufshcd_is_auto_hibern8_supported(struct ufs_hba *hba) return (hba->capabilities & MASK_AUTO_HIBERN8_SUPPORT); } +static inline bool ufshcd_is_auto_hibern8_enabled(struct ufs_hba *hba) +{ + return FIELD_GET(UFSHCI_AHIBERN8_TIMER_MASK, hba->ahit) ? true : false; +} + #define ufshcd_writel(hba, val, reg) \ writel((val), (hba)->mmio_base + (reg)) #define ufshcd_readl(hba, reg) \ |