Patch "powercap / RAPL: fix BIOS lock check" has been added to the 3.14-stable tree

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

powercap / RAPL: fix BIOS lock check

to the 3.14-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:
powercap-rapl-fix-bios-lock-check.patch
and it can be found in the queue-3.14 subdirectory.

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

From: Prarit Bhargava <[email protected]>
Date: Wed, 9 Dec 2015 08:31:12 -0500
Subject: powercap / RAPL: fix BIOS lock check

From: Prarit Bhargava <[email protected]>

commit 79a21dbfae3cd40d5a801778071a9967b79c2c20 upstream.

Intel RAPL initialized on several systems where the BIOS lock bit (msr 0x610, bit 63) was set. This occured because the return value of rapl_read_data_raw() was being checked, rather than the value of the variable passed in, locked.

This patch properly implments the rapl_read_data_raw() call to check the variable locked, and now the Intel RAPL driver outputs the warning:

intel_rapl: RAPL package 0 domain package locked by BIOS

and does not initialize for the package.

---
 drivers/powercap/intel_rapl.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

@@ -1194,10 +1194,13 @@ static int rapl_detect_domains(struct ra
 
 	for (rd = rp->domains; rd < rp->domains + rp->nr_domains; rd++) {
 		/* check if the domain is locked by BIOS */
-		if (rapl_read_data_raw(rd, FW_LOCK, false, &locked)) {
+		ret = rapl_read_data_raw(rd, FW_LOCK, false, &locked);
+		if (ret)
+			return ret;
+		if (locked) {
 			pr_info("RAPL package %d domain %s locked by BIOS\n",
 				rp->id, rd->name);
-				rd->state |= DOMAIN_STATE_BIOS_LOCKED;
+			rd->state |= DOMAIN_STATE_BIOS_LOCKED;
 		}
 	}
 

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

queue-3.14/powercap-rapl-fix-bios-lock-check.patch