While trying to simplify the ufs core driver with the guard() macro [1], Bart made note of the abuse of the scsi host lock in the ufs driver. Indeed, the host lock is deeply entangled in various flows across the driver, as if it was some occasional default synchronization mean. Here is the first part of defusing it, remove some of those calls around host registers accesses, which needs no protection. Doing this in phases seems like a reasonable approach, given the myriad use of the host lock. Changes compared to v2: - leave out changing ufshcd_tmc_handler Changes compared to v1: - get rid of redundant locking (Bart) - leave out the HCE register [1] https://lore.kernel.org/linux-scsi/0b031b8f-c07c-42ef-af93-7336439d3c37@xxxxxxx/ Avri Altman (3): scsi: ufs: core: Remove redundant host_lock calls around UTMRLDBR. scsi: ufs: core: Remove redundant host_lock calls around UTMRLCLR scsi: ufs: core: Remove redundant host_lock calls around UTRLCLR. drivers/ufs/core/ufshcd.c | 20 ++++++-------------- 1 file changed, 6 insertions(+), 14 deletions(-) -- 2.25.1
