From: Arnd Bergmann Date: Fri, 1 Jan 2016 13:07:41 +0000 (+0100) Subject: drm: powerplay: use div64_s64 instead of do_div X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=6a53b31349e7fbe6f742b7f09d7c2118d4fe81e3;p=deliverable%2Flinux.git drm: powerplay: use div64_s64 instead of do_div The newly added code for Fiji creates a correct compiler warning about invalid use of the do_div macro: In file included from powerplay/hwmgr/ppatomctrl.c:31:0: drivers/gpu/drm/amd/amdgpu/../powerplay/hwmgr/ppevvmath.h: In function 'fDivide': drivers/gpu/drm/amd/amdgpu/../powerplay/hwmgr/ppevvmath.h:382:89: warning: comparison of distinct pointer types lacks a cast do_div(longlongX, longlongY); /*Q(32,32) divided by Q(16,16) = Q(16,16) Back to original format */ do_div() divides an unsigned 64-bit number by an unsigned 32-bit number. The code instead wants to divide two signed 64-bit numbers, which is done using the div64_s64 function. Reviewed-by: Thierry Reding Reviewed-by: Christian König Signed-off-by: Arnd Bergmann Fixes: 770911a3cfbb ("drm/amd/powerplay: add/update headers for Fiji SMU and DPM") Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/ppevvmath.h b/drivers/gpu/drm/amd/powerplay/hwmgr/ppevvmath.h index 42f2423cddea..411cb0fcdf98 100644 --- a/drivers/gpu/drm/amd/powerplay/hwmgr/ppevvmath.h +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/ppevvmath.h @@ -379,7 +379,7 @@ fInt fDivide (fInt X, fInt Y) longlongX = longlongX << 16; /*Q(16,16) -> Q(32,32) */ - do_div(longlongX, longlongY); /*Q(32,32) divided by Q(16,16) = Q(16,16) Back to original format */ + div64_s64(longlongX, longlongY); /*Q(32,32) divided by Q(16,16) = Q(16,16) Back to original format */ fQuotient.full = (int)longlongX; return fQuotient;