From: Ewan D. Milne <emilne@xxxxxxxxxx> scsi: sd: Add "probe_type" module parameter to allow synchronous probing Setting probe_type="sync" will force synchronous probing in the driver core, which forces the ordering of minor device number assignments when SCSI disk devices are probed, for compatibility with prior versions of RHEL. Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2140017 Upstream Status: RHEL-only Signed-off-by: Ewan D. Milne <emilne@xxxxxxxxxx> diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index blahblah..blahblah 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -129,6 +129,14 @@ static const char *sd_cache_types[] = { "write back, no read (daft)" }; +static const char *sd_probe_types[] = { "async", "sync" }; + +static char sd_probe_type[6] = "async"; +module_param_string(probe, sd_probe_type, sizeof(sd_probe_type), + S_IRUGO|S_IWUSR); +MODULE_PARM_DESC(probe, "async or sync. Setting to 'sync' disables asynchronous " + "device number assignments (sda, sdb, ...)."); + static void sd_set_flush_flag(struct scsi_disk *sdkp) { bool wc = false, fua = false; @@ -3858,6 +3866,8 @@ static int __init init_sd(void) goto err_out_class; } + if (!strcmp(sd_probe_type, "sync")) + sd_template.gendrv.probe_type = PROBE_FORCE_SYNCHRONOUS; err = scsi_register_driver(&sd_template.gendrv); if (err) goto err_out_driver; -- https://gitlab.com/cki-project/kernel-ark/-/merge_requests/2504 _______________________________________________ kernel mailing list -- kernel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to kernel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/kernel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
