While accessing a scsi_device, the use count of the underlying LLDD module is incremented. The module reference is retrieved through .module field of struct scsi_host_template.
This mapping between scsi_device and underlying LLDD module works well except some scsi drivers (ufs and unusual usb storage drivers). These drivers consist with core driver and actual LLDDs, and scsi_host_template is defined in the core driver. So the actual LLDDs can be unloaded even if the scsi_device is being accessed. This patch series first adds ability to adjust module reference for scsi host by LLDDs and then fixes ufs and unusual usb storage drivers by adjusting module reference after scsi host allocation. Akinobu Mita (3): scsi: add ability to adjust module reference for scsi host scsi: ufs: adjust module reference for scsi host usb: storage: adjust module reference for scsi host drivers/scsi/hosts.c | 1 + drivers/scsi/scsi.c | 4 ++-- drivers/scsi/ufs/ufshcd-pci.c | 1 + drivers/scsi/ufs/ufshcd-pltfrm.c | 1 + drivers/scsi/ufs/ufshcd.c | 1 - drivers/usb/storage/alauda.c | 1 + drivers/usb/storage/cypress_atacb.c | 2 ++ drivers/usb/storage/datafab.c | 1 + drivers/usb/storage/ene_ub6250.c | 1 + drivers/usb/storage/freecom.c | 1 + drivers/usb/storage/isd200.c | 1 + drivers/usb/storage/jumpshot.c | 1 + drivers/usb/storage/karma.c | 1 + drivers/usb/storage/onetouch.c | 2 ++ drivers/usb/storage/realtek_cr.c | 2 ++ drivers/usb/storage/sddr09.c | 2 ++ drivers/usb/storage/sddr55.c | 1 + drivers/usb/storage/shuttle_usbat.c | 1 + include/scsi/scsi_host.h | 1 + 19 files changed, 23 insertions(+), 3 deletions(-) Cc: Vinayak Holikatti <[email protected]> Cc: Dolev Raviv <[email protected]> Cc: Sujit Reddy Thumma <[email protected]> Cc: Subhash Jadavani <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: "James E.J. Bottomley" <[email protected]> Cc: Matthew Dharm <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
