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mdr@sgi.com 6dd727da92 [SCSI] mptfc: race between mptfc_register_dev and mptfc_target_alloc ... A race condition exists in mptfc between the thread registering a device with the fc transport and the scan work generated by the transport. This race existed prior to the application of the mptfc bug fix patch. mptfc_register_dev() calls fc_remote_port_add() with the FC_RPORT_ROLE_TARGET bit set in the rport ids passed to the function. Having this bit set causes fc_remote_port_add() to schedule a scan of the device. This scan can execute before mptfc_register_dev() can fill in the dd_data in the rport structure. When this happens, mptfc_target_alloc() will fail because dd_data is null. Attached is a patch which fixes the problem. The patch changes the rport ids passed to fc_remote_port_add() to not have the TARGET bit set. This prevents the scan from being scheduled. After mptfc_register_dev() fills in the rport dd_data field, fc_remote_port_rolechg() is called, changing the role of the rport to TARGET. Thus, the scan is scheduled after dd_data is filled in which prevents the failure in mptfc_target_alloc(). Signed-off-by: Michael Reed <mdr@sgi.com> Signed-off-by: Eric Moore <Eric.Moore@lsil.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>		19 years ago
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lsi	…
Kconfig	…
Makefile	…
linux_compat.h	…
mptbase.c	[SCSI] fusion - bug fix stack overflow in mptbase	19 years ago
mptbase.h	…
mptctl.c	…
mptctl.h	…
mptfc.c	[SCSI] mptfc: race between mptfc_register_dev and mptfc_target_alloc	19 years ago
mptlan.c	…
mptlan.h	…
mptsas.c	…
mptscsih.c	…
mptscsih.h	…
mptspi.c	[SCSI] mptspi: revalidate negotiation parameters after host reset and resume	19 years ago