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| author | Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> | 2025-11-10 03:47:48 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-11-24 12:30:12 +0300 |
| commit | 753ca4b5beff8fbc4ffce9ba3c54e3d3f63b16f6 (patch) | |
| tree | e1716d7c72337a4465728422798ca5ce65f11d0d /include/ufs | |
| parent | d1f293ee8dc309f462724f852450a763f2ccf6d6 (diff) | |
| download | linux-753ca4b5beff8fbc4ffce9ba3c54e3d3f63b16f6.tar.xz | |
scsi: ufs: core: Add a quirk for handling broken LSDBS field in controller capabilities register
[ Upstream commit cd06b713a6880997ca5aecac8e33d5f9c541749e ]
'Legacy Queue & Single Doorbell Support (LSDBS)' field in the controller
capabilities register is supposed to report whether the legacy single
doorbell mode is supported in the controller or not. But some controllers
report '1' in this field which corresponds to 'LSDB not supported', but
they indeed support LSDB. So let's add a quirk to handle those controllers.
If the quirk is enabled by the controller driver, then LSDBS register field
will be ignored and legacy single doorbell mode is assumed to be enabled
always.
Tested-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20240816-ufs-bug-fix-v3-1-e6fe0e18e2a3@linaro.org
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Stable-dep-of: d968e99488c4 ("scsi: ufs: ufs-pci: Set UFSHCD_QUIRK_PERFORM_LINK_STARTUP_ONCE for Intel ADL")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/ufs')
| -rw-r--r-- | include/ufs/ufshcd.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h index 515b9ca5c54f..c2b29fff4765 100644 --- a/include/ufs/ufshcd.h +++ b/include/ufs/ufshcd.h @@ -670,6 +670,14 @@ enum ufshcd_quirks { * the standard best practice for managing keys). */ UFSHCD_QUIRK_KEYS_IN_PRDT = 1 << 24, + + /* + * This quirk indicates that the controller reports the value 1 (not + * supported) in the Legacy Single DoorBell Support (LSDBS) bit of the + * Controller Capabilities register although it supports the legacy + * single doorbell mode. + */ + UFSHCD_QUIRK_BROKEN_LSDBS_CAP = 1 << 25, }; enum ufshcd_caps { |