Attachment 677052 Details for Bug 892233 – Patch that works around the division by zero

[patch] Patch that works around the division by zero

r600.hack.patch (text/plain), 1.01 KB, created by Mikko Tiihonen on 2013-01-11 18:35:43 UTC

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Creator: Mikko Tiihonen

Created: 2013-01-11 18:35:43 UTC

Size: 1.01 KB

patch

obsolete

>--- ./vanilla-3.7/drivers/gpu/drm/radeon/r600.c	2013-01-07 23:02:57.029414308 +0200
>+++ ./vanilla-3.7/drivers/gpu/drm/radeon/r600.c.fixed	2013-01-11 20:24:15.464141294 +0200
>@@ -1382,14 +1382,15 @@
> 			      u32 disabled_rb_mask)
> {
> 	u32 rendering_pipe_num, rb_num_width, req_rb_num;
>-	u32 pipe_rb_ratio, pipe_rb_remain;
>+	u32 pipe_rb_ratio, pipe_rb_remain, tmp;
> 	u32 data = 0, mask = 1 << (max_rb_num - 1);
> 	unsigned i, j;
> 
>-        printk(KERN_INFO "r6xx_remap_render_backend: tiling_pipe_num=%d, max_rb_num=%d, total_max_rb_num=%d, disabled_rb_mask=%d,\n", tiling_pipe_num,max_rb_num,total_max_rb_num,disabled_rb_mask);
>-
> 	/* mask out the RBs that don't exist on that asic */
>-	disabled_rb_mask |= (0xff << max_rb_num) & 0xff;
>+	tmp = disabled_rb_mask | (0xff << max_rb_num) & 0xff;
>+	if ((tmp & 0xff) != 0xff)
>+		/* only use the formula if it leaves at least one RB available */
>+		disabled_rb_mask = tmp;
> 
> 	rendering_pipe_num = 1 << tiling_pipe_num;
> 	req_rb_num = total_max_rb_num - r600_count_pipe_bits(disabled_rb_mask);

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Attachments on bug 892233: 673228 | 677052