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authorTakahiro Yasui <tyasui@redhat.com>2009-04-29 20:13:02 +0400
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2009-05-24 00:44:05 +0400
commit5c10e63c943b4c67561ddc6bf61e01d4141f881f (patch)
tree7b71f601bcf852159bae15a2cf6caa038d74e27d /drivers/scsi/sun3_NCR5380.c
parentb0d428adebe9f1232c72bf4c686a6f0eed047cc2 (diff)
downloadlinux-5c10e63c943b4c67561ddc6bf61e01d4141f881f.tar.xz
[SCSI] limit state transitions in scsi_internal_device_unblock
scsi timeout on two or more devices may cause extremely long execution time for user applications because SDEV_OFFLINE state is changed to SDEV_RUNNING state during scsi error recovery procedures triggered by a bus reset or a host reset of scsi LLD, and scsi timeout can happens on the same devices many times. This happens because scsi_internal_device_unblock() changes device's state to SDEV_RUNNING even if a device in other states than SDEV_BLOCK, while the following two transitions are required in this function. SDEV_BLOCK -> SDEV_RUNNING SDEV_CREATED_BLOCK -> SDEV_CREATED Otherwise, it returns -EINVAL. Signed-off-by: Takahiro Yasui <tyasui@redhat.com> [matthew@wil.cx: supplied rewritten base for patch] Signed-off-by: Matthew Wilcox <matthew@wil.cx> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/sun3_NCR5380.c')
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