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 ufs, unusual usb storage drivers, and sub drivers for esp_scsi. 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 actual LLDDs by adjusting module reference after scsi host allocation. * v6: - Rebased as v5 doesn't apply cleanly to the latest tree anymore. * v5: - Discard v4 changes and restore to v3. Because v4 shows that moving owner module field from scsi_host_template to Scsi_Host requires a lot of changes and introduces complication to existing drivers which don't have the module reference mismatch issue. - Rebased to the 4.0-rc1 * v4: - Patch series is almost rewritten as module reference field in struct scsi_host_template has been unused anymore. So Acked-by: and Reviewed-by: tags that have been received are deleted. * v3: - Add fix for ESP SCSI drivers * v2: - Pass correct module reference to usb_stor_probe1() instead of touching all ums-* drivers, suggested by Alan Stern Akinobu Mita (4): 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 scsi: esp_scsi: adjust module reference for scsi host drivers/scsi/am53c974.c | 3 +-- drivers/scsi/esp_scsi.c | 16 +++++++++++++--- drivers/scsi/esp_scsi.h | 11 +++++++---- drivers/scsi/hosts.c | 1 + drivers/scsi/jazz_esp.c | 3 +-- drivers/scsi/mac_esp.c | 3 +-- drivers/scsi/scsi.c | 4 ++-- drivers/scsi/sun3x_esp.c | 3 +-- drivers/scsi/sun_esp.c | 3 +-- drivers/scsi/ufs/ufshcd-pci.c | 1 + drivers/scsi/ufs/ufshcd-pltfrm.c | 1 + drivers/scsi/ufs/ufshcd.c | 1 - drivers/usb/storage/usb.c | 8 +++++--- drivers/usb/storage/usb.h | 7 +++++-- include/scsi/scsi_host.h | 1 + 15 files changed, 41 insertions(+), 25 deletions(-) Cc: Vinayak Holikatti <vinholikatti@xxxxxxxxx> Cc: Dolev Raviv <draviv@xxxxxxxxxxxxxx> Cc: Sujit Reddy Thumma <sthumma@xxxxxxxxxxxxxx> Cc: Subhash Jadavani <subhashj@xxxxxxxxxxxxxx> Cc: Christoph Hellwig <hch@xxxxxx> Cc: "James E.J. Bottomley" <JBottomley@xxxxxxxxxxxxx> Cc: Matthew Dharm <mdharm-usb@xxxxxxxxxxxxxxxxxx> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> Cc: "David S. Miller" <davem@xxxxxxxxxxxxx> Cc: Hannes Reinecke <hare@xxxxxxx> Cc: linux-usb@xxxxxxxxxxxxxxx Cc: usb-storage@xxxxxxxxxxxxxxxxxxxxxxxx Cc: linux-scsi@xxxxxxxxxxxxxxx -- 1.9.1 -- 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
