On Wed, Jan 30, 2019 at 09:58:53AM -0600, Bjorn Helgaas wrote: > On Wed, Jan 30, 2019 at 12:33:47PM +0000, Lorenzo Pieralisi wrote: > > On Wed, Jan 02, 2019 at 02:03:53PM +0800, [email protected] wrote: > > > From: Honghui Zhang <[email protected]> > > > > > > drivers/pci/pcie-mediatek.c:720:13-16: WARNING: Suspicious code. > > > resource_size is maybe missing with mem > > > > > > Generated by: scripts/coccinelle/api/resource_size.cocci > > > > > > Signed-off-by: Honghui Zhang <[email protected]> > > > --- > > > drivers/pci/controller/pcie-mediatek.c | 4 +--- > > > 1 file changed, 1 insertion(+), 3 deletions(-) > > > > > > diff --git a/drivers/pci/controller/pcie-mediatek.c > > > b/drivers/pci/controller/pcie-mediatek.c > > > index e307166..0168376 100644 > > > --- a/drivers/pci/controller/pcie-mediatek.c > > > +++ b/drivers/pci/controller/pcie-mediatek.c > > > @@ -654,7 +654,6 @@ static int mtk_pcie_startup_port_v2(struct > > > mtk_pcie_port *port) > > > struct resource *mem = &pcie->mem; > > > const struct mtk_pcie_soc *soc = port->pcie->soc; > > > u32 val; > > > - size_t size; > > > int err; > > > > > > /* MT7622 platforms need to enable LTSSM and ASPM from PCIe subsys */ > > > @@ -706,8 +705,7 @@ static int mtk_pcie_startup_port_v2(struct > > > mtk_pcie_port *port) > > > mtk_pcie_enable_msi(port); > > > > > > /* Set AHB to PCIe translation windows */ > > > - size = mem->end - mem->start; > > > - val = lower_32_bits(mem->start) | AHB2PCIE_SIZE(fls(size)); > > > + val = lower_32_bits(mem->start) | > > > AHB2PCIE_SIZE(fls(resource_size(mem))); > > > > checkpatch warns on this line, please make sure patches pass it before > > posting them. > > I didn't actually run checkpatch myself, so I don't know why it > complained.
WARNING: line over 80 characters #35: FILE: drivers/pci/controller/pcie-mediatek.c:708: + val = lower_32_bits(mem->start) | AHB2PCIE_SIZE(fls(resource_size(mem))); I do run it as a sanity check. > The patch you merged moves "mem_size = resource_size(mem)" higher up, > away from the previous location and its use, which makes it a little > harder to read. That's because it was how the original code (which as you pointed out is likely buggy) was written. Anyway patch dropped waiting for a v2 consistent with your review - apologies for missing some key review points. Lorenzo
