linux-kernel - [PATCH AUTOSEL 6.6 287/294] accel/qaic: Mask out SR-IOV PCI resources

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Message-Id: <20250505225634.2688578-287-sashal@kernel.org>
Date: Mon,  5 May 2025 18:56:27 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Youssef Samir <quic_yabdulra@...cinc.com>,
	Jeffrey Hugo <quic_jhugo@...cinc.com>,
	Lizhi Hou <lizhi.hou@....com>,
	Sasha Levin <sashal@...nel.org>,
	jeff.hugo@....qualcomm.com,
	ogabbay@...nel.org,
	linux-arm-msm@...r.kernel.org,
	dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 6.6 287/294] accel/qaic: Mask out SR-IOV PCI resources

From: Youssef Samir <quic_yabdulra@...cinc.com>

[ Upstream commit 8685520474bfc0fe4be83c3cbfe3fb3e1ca1514a ]

During the initialization of the qaic device, pci_select_bars() is
used to fetch a bitmask of the BARs exposed by the device. On devices
that have Virtual Functions capabilities, the bitmask includes SR-IOV
BARs.

Use a mask to filter out SR-IOV BARs if they exist.

Signed-off-by: Youssef Samir <quic_yabdulra@...cinc.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@...cinc.com>
Signed-off-by: Jeffrey Hugo <quic_jhugo@...cinc.com>
Reviewed-by: Lizhi Hou <lizhi.hou@....com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250117170943.2643280-6-quic_jhugo@quicinc.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/accel/qaic/qaic_drv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/accel/qaic/qaic_drv.c b/drivers/accel/qaic/qaic_drv.c
index b5de82e6eb4d5..e69bfb30b44e0 100644
--- a/drivers/accel/qaic/qaic_drv.c
+++ b/drivers/accel/qaic/qaic_drv.c
@@ -400,7 +400,7 @@ static int init_pci(struct qaic_device *qdev, struct pci_dev *pdev)
 	int bars;
 	int ret;
 
-	bars = pci_select_bars(pdev, IORESOURCE_MEM);
+	bars = pci_select_bars(pdev, IORESOURCE_MEM) & 0x3f;
 
 	/* make sure the device has the expected BARs */
 	if (bars != (BIT(0) | BIT(2) | BIT(4))) {
-- 
2.39.5