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* [PATCH] PCI: dwc: clean up computing of msix_tbl
@ 2020-04-20  6:52 Jiri Slaby
  2020-05-05  9:57 ` Lorenzo Pieralisi
  0 siblings, 1 reply; 2+ messages in thread
From: Jiri Slaby @ 2020-04-20  6:52 UTC (permalink / raw)
  To: jingoohan1
  Cc: gustavo.pimentel, lorenzo.pieralisi, amurray, bhelgaas,
	linux-pci, linux-kernel, Jiri Slaby, Kishon Vijay Abraham I

Commit 6f5e193bfb55 ("PCI: dwc: Fix dw_pcie_ep_raise_msix_irq() to get
correct MSI-X table address") overcomplicated the computation of the
msix_tbl address. Simplify it as it's simply the addr + offset. Provided
addr is (void *) already.

objdump -d shows no difference after this patch.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
---
 drivers/pci/controller/dwc/pcie-designware-ep.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
index 1cdcbd102ce8..c815d36905b6 100644
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -433,7 +433,6 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
 	struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
 	struct pci_epf_msix_tbl *msix_tbl;
 	struct pci_epc *epc = ep->epc;
-	struct pci_epf_bar *epf_bar;
 	u32 reg, msg_data, vec_ctrl;
 	unsigned int aligned_offset;
 	u32 tbl_offset;
@@ -446,10 +445,7 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
 	bir = (tbl_offset & PCI_MSIX_TABLE_BIR);
 	tbl_offset &= PCI_MSIX_TABLE_OFFSET;
 
-	epf_bar = ep->epf_bar[bir];
-	msix_tbl = epf_bar->addr;
-	msix_tbl = (struct pci_epf_msix_tbl *)((char *)msix_tbl + tbl_offset);
-
+	msix_tbl = ep->epf_bar[bir]->addr + tbl_offset;
 	msg_addr = msix_tbl[(interrupt_num - 1)].msg_addr;
 	msg_data = msix_tbl[(interrupt_num - 1)].msg_data;
 	vec_ctrl = msix_tbl[(interrupt_num - 1)].vector_ctrl;
-- 
2.26.1


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2020-04-20  6:52 [PATCH] PCI: dwc: clean up computing of msix_tbl Jiri Slaby
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