Messages in this thread | | | Subject | RE: [Patch] PCI: check szhi when sz is 0 for 64 bit pref mem | Date | Mon, 6 Nov 2006 14:15:23 -0800 | From | "Lu, Yinghai" <> |
| |
-----Original Message----- From: Andrew Morton [mailto:akpm@osdl.org] >I don't really understand what this patch does. >We have a PCI device with a 64-bit BAR and the size is also 64-bit and is >larger than 4G, yes?
Yes
>But the code appears to already be attempting to handle such devices. >Confused.
The old code will Try to calculate the sz from lo 32 bit addr reg, and sz is 0 if the 64 bit resource size if 4G above, so it will continue can skip that register, and it will go on try to treat the hi 32bit addr reg as another 32 bit resource addr reg.
YH
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |