linux-kernel - [PATCH 1/2] PCI/switechtec: Add missing __iomem and _

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Message-Id: <20200728192434.18993-1-logang@deltatee.com>
Date:   Tue, 28 Jul 2020 13:24:33 -0600
From:   Logan Gunthorpe <logang@...tatee.com>
To:     linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>
Cc:     Kelvin.Cao@...rochip.com, Logan Gunthorpe <logang@...tatee.com>
Subject: [PATCH 1/2] PCI/switechtec: Add missing __iomem and __user tags to fix sparse warnings

Fix a number of missing __iomem and __user tags in the ioctl functions of
the switchtec driver. This fixes a number of sparse warnings of the form:

  sparse: sparse: incorrect type in ... (different address spaces)

Fixes: 52eabba5bcdb ("switchtec: Add IOCTLs to the Switchtec driver")
Signed-off-by: Logan Gunthorpe <logang@...tatee.com>

---

Here are a couple quick patches to fix some sparse warnings I was
notified about a couple weeks ago.

I've split them into two patches based on Fixes tag, but they could be
squashed depending on the preference.

Thanks!

drivers/pci/switch/switchtec.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c
index 850cfeb74608..3d5da7f44378 100644
--- a/drivers/pci/switch/switchtec.c
+++ b/drivers/pci/switch/switchtec.c
@@ -940,7 +940,7 @@ static u32 __iomem *event_hdr_addr(struct switchtec_dev *stdev,
 	size_t off;

 	if (event_id < 0 || event_id >= SWITCHTEC_IOCTL_MAX_EVENTS)
-		return ERR_PTR(-EINVAL);
+		return (u32 __iomem *)ERR_PTR(-EINVAL);

 	off = event_regs[event_id].offset;

@@ -948,10 +948,10 @@ static u32 __iomem *event_hdr_addr(struct switchtec_dev *stdev,
 		if (index == SWITCHTEC_IOCTL_EVENT_LOCAL_PART_IDX)
 			index = stdev->partition;
 		else if (index < 0 || index >= stdev->partition_count)
-			return ERR_PTR(-EINVAL);
+			return (u32 __iomem *)ERR_PTR(-EINVAL);
 	} else if (event_regs[event_id].map_reg == pff_ev_reg) {
 		if (index < 0 || index >= stdev->pff_csr_count)
-			return ERR_PTR(-EINVAL);
+			return (u32 __iomem *)ERR_PTR(-EINVAL);
 	}

 	return event_regs[event_id].map_reg(stdev, off, index);
@@ -1057,11 +1057,11 @@ static int ioctl_event_ctl(struct switchtec_dev *stdev,
 }

 static int ioctl_pff_to_port(struct switchtec_dev *stdev,
-			     struct switchtec_ioctl_pff_port *up)
+			     struct switchtec_ioctl_pff_port __user *up)
 {
 	int i, part;
 	u32 reg;
-	struct part_cfg_regs *pcfg;
+	struct part_cfg_regs __iomem *pcfg;
 	struct switchtec_ioctl_pff_port p;

 	if (copy_from_user(&p, up, sizeof(p)))
@@ -1104,10 +1104,10 @@ static int ioctl_pff_to_port(struct switchtec_dev *stdev,
 }

 static int ioctl_port_to_pff(struct switchtec_dev *stdev,
-			     struct switchtec_ioctl_pff_port *up)
+			     struct switchtec_ioctl_pff_port __user *up)
 {
 	struct switchtec_ioctl_pff_port p;
-	struct part_cfg_regs *pcfg;
+	struct part_cfg_regs __iomem *pcfg;

 	if (copy_from_user(&p, up, sizeof(p)))
 		return -EFAULT;

base-commit: 92ed301919932f777713b9172e525674157e983d
--
2.20.1