RE: Query: SCSI Device node creation when UFS is loaded as a module

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> 
> Hi
> I'm loading the ufs-qcom driver as a module but am not seeing the
> /dev/sda* device nodes.
> Looks like it's not being created.
> 
> I find the sda nodes in other paths being enumerated though:
> 
> / # find /sys -name sda
> /sys/kernel/debug/block/sda
> /sys/class/block/sda
> /sys/devices/platform/<...>/<xxx>.ufshc/host0/target0:0:0/0:0:0:0/block/sda
> /sys/block/sda
> 
> All Luns are detected and I see sda is detected and prints for all the Luns as
> below -:
> sd 0:0:0:0: [sda] .... ....-byte logical blocks:
> 
> ... so on ...
> 
> But if I link it statically instead of a module, it works fine. All device nodes are
> created.
> 
> I'm trying to figure out where/how in SCSI does it create these device nodes -
> /dev/sd<a/b/c/d> ?
> I've looked into sd.c but I couldn't figure out the exact place yet.
> 
> Any pointers please?
I guess it's most probably in scsi_sysfs_add_devices, part of the async scan:
ufshcd_async_scan-> ufshcd_probe_hba-> scsi_scan_host->__scsi_scan_target-> scsi_probe_and_add_lun...

Thanks,
Avri




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