3.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Thomas Hellstrom <thellst...@vmware.com>
commit 4e578080ed3262ed2c3985868539bc66218d25c0 upstream.
Commit "drm/vmwgfx: correct fb_fix_screeninfo.line_length", while fixing a
vmwgfx fbdev bug, also writes the pitch to a supposedly read-only register:
SVGA_REG_BYTES_PER_LINE, while it should be (and also in fact is) written to
SVGA_REG_PITCHLOCK.
This patch is Cc'd stable because of the unknown effects writing to this
register might have, particularly on older device versions.
v2: Updated log message.
Cc: Christopher Friedt <chrisfri...@gmail.com>
Tested-by: Christopher Friedt <chrisfri...@gmail.com>
Signed-off-by: Thomas Hellstrom <thellst...@vmware.com>
Reviewed-by: Jakob Bornecrantz <ja...@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/gpu/drm/vmwgfx/vmwgfx_fb.c | 1 -
1 file changed, 1 deletion(-)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_fb.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fb.c
@@ -179,7 +179,6 @@ static int vmw_fb_set_par(struct fb_info
vmw_write(vmw_priv, SVGA_REG_DISPLAY_POSITION_Y,
info->var.yoffset);
vmw_write(vmw_priv, SVGA_REG_DISPLAY_WIDTH, info->var.xres);
vmw_write(vmw_priv, SVGA_REG_DISPLAY_HEIGHT, info->var.yres);
- vmw_write(vmw_priv, SVGA_REG_BYTES_PER_LINE,
info->fix.line_length);
vmw_write(vmw_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
}
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