This is a note to let you know that I've just added the patch titled
s390/dasd: add missing discipline function
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
s390-dasd-add-missing-discipline-function.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c0c8a8397fa8a74d04915f4d3d28cb4a5d401427 Mon Sep 17 00:00:00 2001
From: Stefan Haberland <sth@xxxxxxxxxxxxx>
Date: Tue, 25 May 2021 14:50:06 +0200
Subject: s390/dasd: add missing discipline function
From: Stefan Haberland <sth@xxxxxxxxxxxxx>
commit c0c8a8397fa8a74d04915f4d3d28cb4a5d401427 upstream.
Fix crash with illegal operation exception in dasd_device_tasklet.
Commit b72949328869 ("s390/dasd: Prepare for additional path event handling")
renamed the verify_path function for ECKD but not for FBA and DIAG.
This leads to a panic when the path verification function is called for a
FBA or DIAG device.
Fix by defining a wrapper function for dasd_generic_verify_path().
Fixes: b72949328869 ("s390/dasd: Prepare for additional path event handling")
Cc: <stable@xxxxxxxxxxxxxxx> #5.11
Reviewed-by: Jan Hoeppner <hoeppner@xxxxxxxxxxxxx>
Signed-off-by: Stefan Haberland <sth@xxxxxxxxxxxxx>
Reviewed-by: Cornelia Huck <cohuck@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210525125006.157531-2-sth@xxxxxxxxxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/s390/block/dasd_diag.c | 8 +++++++-
drivers/s390/block/dasd_fba.c | 8 +++++++-
drivers/s390/block/dasd_int.h | 1 -
3 files changed, 14 insertions(+), 3 deletions(-)
--- a/drivers/s390/block/dasd_diag.c
+++ b/drivers/s390/block/dasd_diag.c
@@ -644,12 +644,18 @@ static void dasd_diag_setup_blk_queue(st
blk_queue_segment_boundary(q, PAGE_SIZE - 1);
}
+static int dasd_diag_pe_handler(struct dasd_device *device,
+ __u8 tbvpm, __u8 fcsecpm)
+{
+ return dasd_generic_verify_path(device, tbvpm);
+}
+
static struct dasd_discipline dasd_diag_discipline = {
.owner = THIS_MODULE,
.name = "DIAG",
.ebcname = "DIAG",
.check_device = dasd_diag_check_device,
- .verify_path = dasd_generic_verify_path,
+ .pe_handler = dasd_diag_pe_handler,
.fill_geometry = dasd_diag_fill_geometry,
.setup_blk_queue = dasd_diag_setup_blk_queue,
.start_IO = dasd_start_diag,
--- a/drivers/s390/block/dasd_fba.c
+++ b/drivers/s390/block/dasd_fba.c
@@ -803,13 +803,19 @@ static void dasd_fba_setup_blk_queue(str
blk_queue_flag_set(QUEUE_FLAG_DISCARD, q);
}
+static int dasd_fba_pe_handler(struct dasd_device *device,
+ __u8 tbvpm, __u8 fcsecpm)
+{
+ return dasd_generic_verify_path(device, tbvpm);
+}
+
static struct dasd_discipline dasd_fba_discipline = {
.owner = THIS_MODULE,
.name = "FBA ",
.ebcname = "FBA ",
.check_device = dasd_fba_check_characteristics,
.do_analysis = dasd_fba_do_analysis,
- .verify_path = dasd_generic_verify_path,
+ .pe_handler = dasd_fba_pe_handler,
.setup_blk_queue = dasd_fba_setup_blk_queue,
.fill_geometry = dasd_fba_fill_geometry,
.start_IO = dasd_start_IO,
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -298,7 +298,6 @@ struct dasd_discipline {
* e.g. verify that new path is compatible with the current
* configuration.
*/
- int (*verify_path)(struct dasd_device *, __u8);
int (*pe_handler)(struct dasd_device *, __u8);
/*
Patches currently in stable-queue which might be from sth@xxxxxxxxxxxxx are
queue-5.4/s390-dasd-prepare-for-additional-path-event-handling.patch
queue-5.4/s390-dasd-add-missing-discipline-function.patch
queue-5.4/s390-dasd-fix-potential-memleak-in-dasd_eckd_init.patch
