Re: [PATCH] Cleanup libata HPA support

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Ben Collins wrote:
..
 static u64 ata_tf_to_lba48(struct ata_taskfile *tf)
 {
-	u64 sectors = 0;
+	u64 sectors;
+	u32 high, low;
- sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
-	sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
-	sectors |= (tf->hob_lbal & 0xff) << 24;
-	sectors |= (tf->lbah & 0xff) << 16;
-	sectors |= (tf->lbam & 0xff) << 8;
-	sectors |= (tf->lbal & 0xff);
+	high = (tf->hob_lbah << 16) |
+	       (tf->hob_lbam <<  8) |
+		tf->hob_lbal;
+	low  = (tf->lbah << 16) |
+	       (tf->lbam <<  8) |
+		tf->lbal;
- return ++sectors;
+	sectors = ((u64)high << 24) | low;
+
+	return sectors + 1;
 }

Ben, I very much prefer the fixed version of this function
as implemented by the patch above.

But.. is the original code actually broken, or just messy?

Cheers

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