Messages in this thread | | | Date | Wed, 05 Feb 2020 10:26:35 +0800 | From | Can Guo <> | Subject | Re: [PATCH RESEND v3 3/4] scsi: ufs: fix Auto-Hibern8 error detection |
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On 2020-01-29 18:52, Stanley Chu wrote: > 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 > Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> > Reviewed-by: Bean Huo <beanhuo@micron.com> > ---
Reviewed-by: Can Guo <cang@codeaurora.org>
> drivers/scsi/ufs/ufshcd.c | 3 ++- > drivers/scsi/ufs/ufshcd.h | 6 ++++++ > 2 files changed, 8 insertions(+), 1 deletion(-) > > 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) \
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