Re: [PATCH v2] ata: libata-scsi: abort multi-sector pass-through commands when multi_count is 0

[Niklas Cassel]

On Mon, 21 Sep 2026 03:25:55 +0000, Hui Peng wrote:
> When an ATA_12, ATA_16, or ATA_32 pass-through command with a
> multi-sector PIO command opcode (ATA_CMD_READ_MULTI,
> ATA_CMD_WRITE_MULTI, ATA_CMD_READ_MULTI_EXT, ATA_CMD_WRITE_MULTI_EXT, or
> ATA_CMD_WRITE_MULTI_FUA_EXT) is submitted via SG_IO on a device where
> multiple-sector mode is not configured (dev->multi_count == 0),
> ata_scsi_pass_thru() currently logs a warning and still dispatches the
> taskfile. When the DRQ interrupt fires, ata_pio_sectors() triggers
> WARN_ON_ONCE(qc->dev->multi_count == 0) and computes
> nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size, 0) = 0, failing
> to transfer any sectors:
> 
> [...]

Applied to libata/linux.git (for-7.4), thanks!

[1/1] ata: libata-scsi: abort multi-sector pass-through commands when multi_count is 0
      https://git.kernel.org/libata/linux/c/3bab8c7e

Kind regards,
Niklas