On Wed, 2019-01-30 at 16:31 +0000, Lorenzo Pieralisi wrote: > 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, honghui.zhang@xxxxxxxxxxxx wrote: > > > > From: Honghui Zhang <honghui.zhang@xxxxxxxxxxxx> > > > > > > > > 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 <honghui.zhang@xxxxxxxxxxxx> > > > > --- > > > > 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. > Thanks for your comments, I will send a v2 and fix all the issue you pointed out. > Lorenzo
