From: Mahesh Salgaonkar Date: Thu, 20 Nov 2014 04:14:36 +0000 (+0530) Subject: powerpc/powernv: Fix the hmi event version check. X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=6acbc5a1dab30aa8f7be7bf3852f343f89147ac5;p=openwrt%2Fstaging%2Fblogic.git powerpc/powernv: Fix the hmi event version check. The current HMI event structure is an ABI and carries a version field to accommodate future changes without affecting/rearranging current structure members that are valid for previous versions. The current version check "if (hmi_evt->version != OpalHMIEvt_V1)" doesn't accomodate the fact that the version number may change in future. If firmware starts returning an HMI event with version > 1, this check will fail and no HMI information will be printed on older kernels. This patch fixes this issue. Cc: stable@vger.kernel.org # 3.17+ Signed-off-by: Mahesh Salgaonkar [mpe: Reword changelog] Signed-off-by: Michael Ellerman --- diff --git a/arch/powerpc/platforms/powernv/opal-hmi.c b/arch/powerpc/platforms/powernv/opal-hmi.c index 5e1ed1575aab..b322bfb51343 100644 --- a/arch/powerpc/platforms/powernv/opal-hmi.c +++ b/arch/powerpc/platforms/powernv/opal-hmi.c @@ -57,7 +57,7 @@ static void print_hmi_event_info(struct OpalHMIEvent *hmi_evt) }; /* Print things out */ - if (hmi_evt->version != OpalHMIEvt_V1) { + if (hmi_evt->version < OpalHMIEvt_V1) { pr_err("HMI Interrupt, Unknown event version %d !\n", hmi_evt->version); return;