diff options
Diffstat (limited to 'drivers/scsi/sd.c')
| -rw-r--r-- | drivers/scsi/sd.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 11c1738c2100..3ef221493d6c 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -898,6 +898,26 @@ static void sd_config_write_same(struct scsi_disk *sdkp) else sdkp->zeroing_mode = SD_ZERO_WRITE; + if (sdkp->max_ws_blocks && + sdkp->physical_block_size > logical_block_size) { + /* + * Reporting a maximum number of blocks that is not aligned + * on the device physical size would cause a large write same + * request to be split into physically unaligned chunks by + * __blkdev_issue_write_zeroes() and __blkdev_issue_write_same() + * even if the caller of these functions took care to align the + * large request. So make sure the maximum reported is aligned + * to the device physical block size. This is only an optional + * optimization for regular disks, but this is mandatory to + * avoid failure of large write same requests directed at + * sequential write required zones of host-managed ZBC disks. + */ + sdkp->max_ws_blocks = + round_down(sdkp->max_ws_blocks, + bytes_to_logical(sdkp->device, + sdkp->physical_block_size)); + } + out: blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks * (logical_block_size >> 9)); |