From: Hugh Dickins <hugh@xxxxxxxxxxx> CONFIG_MODULES=y CONFIG_SCSI=y CONFIG_SCSI_SCAN_ASYNC=y CONFIG_SCSI_WAIT_SCAN=m 2.6.21-rc5-mm2 VFS panics unable to find my root on /dev/sda2, but boots okay if I change drivers/scsi/Kconfig to "default y" instead of "default m" for SCSI_WAIT_SCAN. Make sure there's a late_initcall to scsi_complete_async_scans when it's built in, so a monolithic SCSI_SCAN_ASYNC kernel can rely on the scans being completed before trying to mount root, even if they're slow. [akpm@xxxxxxxxxxxxxxxxxxxx: build fixes] Signed-off-by: Hugh Dickins <hugh@xxxxxxxxxxx> Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxx> --- James sayeth "This isn't the right fix ... this has to be invoked last in the call sequence ... I can't see another way of doing this except yet another file added as a final component to the link." Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/scsi/scsi_scan.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff -puN drivers/scsi/scsi_scan.c~scsi-fix-config_scsi_wait_scan=m drivers/scsi/scsi_scan.c --- a/drivers/scsi/scsi_scan.c~scsi-fix-config_scsi_wait_scan=m +++ a/drivers/scsi/scsi_scan.c @@ -184,6 +184,15 @@ int scsi_complete_async_scans(void) /* Only exported for the benefit of scsi_wait_scan */ EXPORT_SYMBOL_GPL(scsi_complete_async_scans); +#ifndef MODULE +/* + * For async scanning we need to wait for all the scans to complete before + * trying to mount the root fs. Otherwise non-modular drivers may not be ready + * yet. + */ +late_initcall(scsi_complete_async_scans); +#endif + /** * scsi_unlock_floptical - unlock device via a special MODE SENSE command * @sdev: scsi device to send command to _ - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
