[SCSI] libsas: fix loopback topology bug during discovery (183ce896) · Commits · 戴 / test

In some test envirenment, there is loopback topology test. We should handle this during discovery. Signed-off-by:

drivers/scsi/libsas/sas_expander.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -244,6 +244,11 @@ static int sas_ex_phy_discover_helper(struct domain_device dev, u8 disc_req,
		* dev to host FIS as described in section G.5 of
		* sas-2 r 04b */
		dr = &((struct smp_resp *)disc_resp)->disc;
		if (memcmp(dev->sas_addr, dr->attached_sas_addr,
		SAS_ADDR_SIZE) == 0) {
		sas_printk("Found loopback topology, just ignore it!\n");
		return 0;
		}
		if (!(dr->attached_dev_type == 0 &&
		dr->attached_sata_dev))
		break;