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From: Jiri Slaby <jslaby@suse.cz>
To: jingoohan1@gmail.com
Cc: gustavo.pimentel@synopsys.com, lorenzo.pieralisi@arm.com,
	amurray@thegoodpenguin.co.uk, bhelgaas@google.com,
	linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
	Jiri Slaby <jslaby@suse.cz>,
	Kishon Vijay Abraham I <kishon@ti.com>
Subject: [PATCH] PCI: dwc: clean up computing of msix_tbl
Date: Mon, 20 Apr 2020 08:52:27 +0200	[thread overview]
Message-ID: <20200420065227.4920-1-jslaby@suse.cz> (raw)

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


             reply	other threads:[~2020-04-20  6:52 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-20  6:52 Jiri Slaby [this message]
2020-05-05  9:57 ` Lorenzo Pieralisi

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