scsi: ufs: ufs-pci: Fix hibernate state transition for Intel MTL-like host controllers

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UFSHCD core disables the UIC completion interrupt when issuing UIC
hibernation commands, and re-enables it afterwards if it was enabled to
start with, refer ufshcd_uic_pwr_ctrl(). For Intel MTL-like host
controllers, accessing the register to re-enable the interrupt disrupts
the state transition.

Use hibern8_notify variant operation to disable the interrupt during the
entire hibernation, thereby preventing the disruption.

Fixes: 4049f7acef ("scsi: ufs: ufs-pci: Add support for Intel MTL")
Cc: stable@vger.kernel.org
Signed-off-by: Archana Patni <archana.patni@intel.com>
Link: https://lore.kernel.org/r/20250723165856.145750-2-adrian.hunter@intel.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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Archana Patni 2025-07-23 19:58:49 +03:00 • committed by Martin K. Petersen

parent 19272b37aa

commit 4428ddea83

1 changed files with 27 additions and 0 deletions

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drivers/ufs/host/ufshcd-pci.c

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