I've been experiencing some issues with disk hotplugging using the AHCI driver with a Marvell 6121 controller. It varies a bit when the driver gives up, but it's almost always within the first three remove/add attempts. I was using 2.6.27.6 for quite some time and never had any issues with hotplug, even after many hotplugs. The problems started when I updated to 2.6.29, and they still exist today on 2.6.33. I'm running a regular i686 non-SMP kernel. Anyone have any ideas? Below are some relevant portions of the kernel log from 2.6.27 and 2.6.33. If anyone needs any more information from me, please let me know. Thanks, -Justin === Removing disk, 2.6.27.6 === ata3: exception Emask 0x10 SAct 0x0 SErr 0x0 action 0xe frozen ata3: irq_stat 0x04400000, PHY RDY changed ata3: hard resetting link ata3: SATA link down (SStatus 0 SControl 300) ata3: hard resetting link ata3: SATA link down (SStatus 0 SControl 300) ata3: hard resetting link ata3: SATA link down (SStatus 0 SControl 300) ata3.00: disabled ata3: EH complete ata3.00: detaching (SCSI 2:0:0:0) sd 2:0:0:0: [sdc] Synchronizing SCSI cache sd 2:0:0:0: [sdc] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK,SUGGEST_OK sd 2:0:0:0: [sdc] Stopping disk sd 2:0:0:0: [sdc] START_STOP FAILED sd 2:0:0:0: [sdc] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK,SUGGEST_OK === Removing disk, 2.6.33 === ata3: exception Emask 0x10 SAct 0x0 SErr 0x0 action 0xe frozen ata3: irq_stat 0x04400000, PHY RDY changed ata3: hard resetting link ata3: SATA link down (SStatus 0 SControl 300) ata3: hard resetting link ata3: SATA link down (SStatus 0 SControl 300) ata3: limiting SATA link speed to 1.5 Gbps ata3: hard resetting link ata3: SATA link down (SStatus 0 SControl 310) ata3.00: disabled ata3: EH complete ata3.00: detaching (SCSI 2:0:0:0) sd 2:0:0:0: [sdc] Synchronizing SCSI cache sd 2:0:0:0: [sdc] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK sd 2:0:0:0: [sdc] Stopping disk sd 2:0:0:0: [sdc] START_STOP FAILED sd 2:0:0:0: [sdc] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK === Adding disk, 2.6.27.6 === ata3: exception Emask 0x10 SAct 0x0 SErr 0x0 action 0xe frozen ata3: irq_stat 0x02400000, PHY RDY changed ata3: hard resetting link ata3: link is slow to respond, please be patient (ready=0) ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 300) ata3.00: ATA-8: ST3750330AS, SD15, max UDMA/133 ata3.00: 1465149168 sectors, multi 0: LBA48 NCQ (depth 0/32) ata3.00: configured for UDMA/133 ata3: EH complete scsi 2:0:0:0: Direct-Access ATA ST3750330AS SD15 PQ: 0 ANSI: 5 sd 2:0:0:0: [sdc] 1465149168 512-byte hardware sectors (750156 MB) sd 2:0:0:0: [sdc] Write Protect is off sd 2:0:0:0: [sdc] Mode Sense: 00 3a 00 00 sd 2:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sd 2:0:0:0: [sdc] 1465149168 512-byte hardware sectors (750156 MB) sd 2:0:0:0: [sdc] Write Protect is off sd 2:0:0:0: [sdc] Mode Sense: 00 3a 00 00 sd 2:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sdc: sdc1 sdc2 sdc4 < sdc5 > sd 2:0:0:0: [sdc] Attached SCSI disk sd 2:0:0:0: Attached scsi generic sg2 type 0 === Adding disk, 2.6.33 === ata3: exception Emask 0x10 SAct 0x0 SErr 0x0 action 0xe frozen ata3: irq_stat 0x02400000, PHY RDY changed ata3: hard resetting link ata3: link is slow to respond, please be patient (ready=0) ata3: COMRESET failed (errno=-16) ata3: hard resetting link ata3: link is slow to respond, please be patient (ready=0) ata3: COMRESET failed (errno=-16) ata3: hard resetting link ata3: link is slow to respond, please be patient (ready=0) ata3: COMRESET failed (errno=-16) ata3: limiting SATA link speed to 1.5 Gbps ata3: hard resetting link ata3: COMRESET failed (errno=-16) ata3: reset failed, giving up ata3: EH complete -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
