5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Bart Van Assche <bvanassche@xxxxxxx>
commit f669b8a683e4ee26fa5cafe19d71cec1786b556a upstream.
Because scsi_finish_command() subtracts the residual from the buffer
length, residual overflows must not be reported. Reflect this in the SCSI
documentation. See also commit 9237f04e12cc ("scsi: core: Fix
scsi_get/set_resid() interface")
Cc: Damien Le Moal <dlemoal@xxxxxxxxxx>
Cc: Hannes Reinecke <hare@xxxxxxx>
Cc: Douglas Gilbert <dgilbert@xxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
Link: https://lore.kernel.org/r/20230721160154.874010-2-bvanassche@xxxxxxx
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
Documentation/scsi/scsi_mid_low_api.rst | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/Documentation/scsi/scsi_mid_low_api.rst
+++ b/Documentation/scsi/scsi_mid_low_api.rst
@@ -1190,11 +1190,11 @@ Members of interest:
- pointer to scsi_device object that this command is
associated with.
resid
- - an LLD should set this signed integer to the requested
+ - an LLD should set this unsigned integer to the requested
transfer length (i.e. 'request_bufflen') less the number
of bytes that are actually transferred. 'resid' is
preset to 0 so an LLD can ignore it if it cannot detect
- underruns (overruns should be rare). If possible an LLD
+ underruns (overruns should not be reported). An LLD
should set 'resid' prior to invoking 'done'. The most
interesting case is data transfers from a SCSI target
device (e.g. READs) that underrun.
