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423f7cf467
libsas: Don't BUG when connecting two expanders via wide port When a device is connected to an expander, the discovery process goes through sas_ex_discover_dev to figure out what's attached to the phy. If it is the case that the phy being discovered happens to be the second phy of a wide link to an expander, that discover_dev function will incorrectly call sas_ex_discover_expander, which creates another sas_port and tries to attach the other sas_phys to the new port, thus triggering a BUG. The correct thing to do is to check the other ex_phys of the expander to see if there's a sas_port for this sas_phy, and attach the sas_phy to the existing sas_port. This is easily triggered if one enables the phys of a wide port between expanders one by one. This second version of the patch fixes a small regression in the case where all the phys show up at once and we accidentally try to attach to a port that hasn't been created yet. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com> |
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| .. | ||
| Kconfig | ||
| Makefile | ||
| sas_discover.c | ||
| sas_dump.c | ||
| sas_dump.h | ||
| sas_event.c | ||
| sas_expander.c | ||
| sas_init.c | ||
| sas_internal.h | ||
| sas_phy.c | ||
| sas_port.c | ||
| sas_scsi_host.c | ||