scsi: sg: fix minor memory leak in error path
commit c170e5a8d222537e98aa8d4fddb667ff7a2ee114 upstream. Fix a minor memory leak when there is an error opening a /dev/sg device. Fixes: cc833acbee9d ("sg: O_EXCL and other lock handling") Cc: <stable@vger.kernel.org> Reviewed-by: Ewan D. Milne <emilne@redhat.com> Signed-off-by: Tony Battersby <tonyb@cybernetics.com> Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -2185,6 +2185,7 @@ sg_add_sfp(Sg_device * sdp)
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write_lock_irqsave(&sdp->sfd_lock, iflags);
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if (atomic_read(&sdp->detaching)) {
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write_unlock_irqrestore(&sdp->sfd_lock, iflags);
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kfree(sfp);
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return ERR_PTR(-ENODEV);
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}
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list_add_tail(&sfp->sfd_siblings, &sdp->sfds);
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