From: Stefan Haberland sth@linux.ibm.com
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@vger.kernel.org #5.11 Reviewed-by: Jan Hoeppner hoeppner@linux.ibm.com Signed-off-by: Stefan Haberland sth@linux.ibm.com Reviewed-by: Cornelia Huck cohuck@redhat.com Link: https://lore.kernel.org/r/20210525125006.157531-2-sth@linux.ibm.com Signed-off-by: Jens Axboe axboe@kernel.dk --- drivers/s390/block/dasd_diag.c | 7 ++++++- drivers/s390/block/dasd_fba.c | 7 ++++++- drivers/s390/block/dasd_int.h | 1 - 3 files changed, 12 insertions(+), 3 deletions(-)
diff --git a/drivers/s390/block/dasd_diag.c b/drivers/s390/block/dasd_diag.c index 1b9e1442e6a5..d5c7b70bd4de 100644 --- a/drivers/s390/block/dasd_diag.c +++ b/drivers/s390/block/dasd_diag.c @@ -642,12 +642,17 @@ static void dasd_diag_setup_blk_queue(struct dasd_block *block) blk_queue_segment_boundary(q, PAGE_SIZE - 1); }
+static int dasd_diag_pe_handler(struct dasd_device *device, __u8 tbvpm) +{ + 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, diff --git a/drivers/s390/block/dasd_fba.c b/drivers/s390/block/dasd_fba.c index 1a44e321b54e..b159575a2760 100644 --- a/drivers/s390/block/dasd_fba.c +++ b/drivers/s390/block/dasd_fba.c @@ -803,13 +803,18 @@ static void dasd_fba_setup_blk_queue(struct dasd_block *block) blk_queue_flag_set(QUEUE_FLAG_DISCARD, q); }
+static int dasd_fba_pe_handler(struct dasd_device *device, __u8 tbvpm) +{ + 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, diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h index e8a06d85d6f7..5d7d35ca5eb4 100644 --- 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);
/*