[SCSI] scsi: Added support for adapter and firmware reset
Added new sysfs attr 'host_reset' in scsi_sysfs.c to perform adapter or firmware reset as suggested by Mike Christie here: http://marc.info/?l=linux-scsi&m=127359347111167&w=2 user/application can write "adapter" or "firmware" on this attr and it will call newly added function hook in scsi_host_template to call LDD adapter or firmware reset implementation. Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com> Reviewed-by: NMike Christie <michaelc@cs.wisc.edu> Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>
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