Patch "libata: disable forced PORTS_IMPL for >= AHCI 1.3" has been added to the 4.3-stable tree

This is a note to let you know that I've just added the patch titled

libata: disable forced PORTS_IMPL for >= AHCI 1.3

to the 4.3-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
libata-disable-forced-ports_impl-for-ahci-1.3.patch
and it can be found in the queue-4.3 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Tejun Heo <[email protected]>
Date: Fri, 15 Jan 2016 15:13:05 -0500
Subject: libata: disable forced PORTS_IMPL for >= AHCI 1.3

From: Tejun Heo <[email protected]>

commit 566d1827df2ef0cbe921d3d6946ac3007b1a6938 upstream.

Some early controllers incorrectly reported zero ports in PORTS_IMPL register and the ahci driver fabricates PORTS_IMPL from the number of ports in those cases. This hasn't mattered but with the new nvme controllers there are cases where zero PORTS_IMPL is valid and should be honored.

Disable the workaround for >= AHCI 1.3.

---
 drivers/ata/libahci.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

@@ -495,8 +495,8 @@ void ahci_save_initial_config(struct dev
 		}
 	}
 
-	/* fabricate port_map from cap.nr_ports */
-	if (!port_map) {
+	/* fabricate port_map from cap.nr_ports for < AHCI 1.3 */
+	if (!port_map && vers < 0x10300) {
 		port_map = (1 << ahci_nr_ports(cap)) - 1;
 		dev_warn(dev, "forcing PORTS_IMPL to 0x%x\n", port_map);
 

Patches currently in stable-queue which might be from [email protected] are

queue-4.3/ahci-fix-softreset-failed-issue-of-port-multiplier.patch queue-4.3/mm-vmstat-allow-wq-concurrency-to-discover-memory-reclaim-doesn-t-make-any-progress.patch queue-4.3/ahci-intel-dnv-device-ids-sata.patch queue-4.3/libata-disable-forced-ports_impl-for-ahci-1.3.patch