| Message ID | c5499db2-2c25-4765-b9e0-1fa26da1cc45@moroto.mountain |
|---|---|
| State | New |
| Headers | show |
| Series | [v3,1/2] PCI: dwc: Fix a 64bit bug in dw_pcie_ep_raise_msix_irq() | expand |
On Mon, Jan 22, 2024 at 06:21:00PM +0300, Dan Carpenter wrote: > I recently changed the code in dw_pcie_ep_raise_msix_irq() to use > ALIGN_DOWN(). The code in dw_pcie_ep_raise_msi_irq() is similar so > update it to match as well. (No effect on runtime, just a cleanup). > > Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org> > --- > v2: Add this patch > v3: Use ALIGN_DOWN() as a style improvement > > drivers/pci/controller/dwc/pcie-designware-ep.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c > index 51679c6702cf..1c8d2e938851 100644 > --- a/drivers/pci/controller/dwc/pcie-designware-ep.c > +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c > @@ -483,8 +483,8 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no, > msg_data = dw_pcie_ep_readw_dbi(ep, func_no, reg); > } > aligned_offset = msg_addr_lower & (epc->mem->window.page_size - 1); > - msg_addr = ((u64)msg_addr_upper) << 32 | > - (msg_addr_lower & ~aligned_offset); > + msg_addr = ((u64)msg_addr_upper) << 32 | msg_addr_lower; > + msg_addr = ALIGN_DOWN(msg_addr, epc->mem->window.page_size); > ret = dw_pcie_ep_map_addr(epc, func_no, 0, ep->msi_mem_phys, msg_addr, > epc->mem->window.page_size); > if (ret) > -- > 2.43.0 > Reviewed-by: Niklas Cassel <cassel@kernel.org> Although, if I'm being super nitpicky (sorry... and feel free to ignore), I think this is slightly cleaner: --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -482,9 +482,10 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no, reg = ep_func->msi_cap + PCI_MSI_DATA_32; msg_data = dw_pcie_ep_readw_dbi(ep, func_no, reg); } - aligned_offset = msg_addr_lower & (epc->mem->window.page_size - 1); - msg_addr = ((u64)msg_addr_upper) << 32 | - (msg_addr_lower & ~aligned_offset); + msg_addr = ((u64)msg_addr_upper) << 32 | msg_addr_lower; + + aligned_offset = msg_addr & (epc->mem->window.page_size - 1); + msg_addr = ALIGN_DOWN(msg_addr, epc->mem->window.page_size); ret = dw_pcie_ep_map_addr(epc, func_no, 0, ep->msi_mem_phys, msg_addr, epc->mem->window.page_size); if (ret)
diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index 51679c6702cf..1c8d2e938851 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -483,8 +483,8 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no, msg_data = dw_pcie_ep_readw_dbi(ep, func_no, reg); } aligned_offset = msg_addr_lower & (epc->mem->window.page_size - 1); - msg_addr = ((u64)msg_addr_upper) << 32 | - (msg_addr_lower & ~aligned_offset); + msg_addr = ((u64)msg_addr_upper) << 32 | msg_addr_lower; + msg_addr = ALIGN_DOWN(msg_addr, epc->mem->window.page_size); ret = dw_pcie_ep_map_addr(epc, func_no, 0, ep->msi_mem_phys, msg_addr, epc->mem->window.page_size); if (ret)
I recently changed the code in dw_pcie_ep_raise_msix_irq() to use ALIGN_DOWN(). The code in dw_pcie_ep_raise_msi_irq() is similar so update it to match as well. (No effect on runtime, just a cleanup). Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org> --- v2: Add this patch v3: Use ALIGN_DOWN() as a style improvement drivers/pci/controller/dwc/pcie-designware-ep.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)