linux-kernel - [PATCH v2] staging: gpib: Fix i386 build issue

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Message-ID: <20241202173301.6462-1-dpenkler@gmail.com>
Date: Mon,  2 Dec 2024 18:33:01 +0100
From: Dave Penkler <dpenkler@...il.com>
To: gregkh@...uxfoundation.org,
	linux-staging@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Cc: linux@...ck-us.net,
	Dave Penkler <dpenkler@...il.com>
Subject: [PATCH v2] staging: gpib: Fix i386 build issue

Both drivers cast resource_type_t to void * causing the build to fail.

With CONFIG_X86_PAE enabled the resource_size_t type is a 64bit unsigned int
which cannot be cast to a 32 bit pointer.

Use ioremap() instead of pci_resource_start()

Reported_by: Guenter Roeck <linux@...ck-us.net>
Link: https://lore.kernel.org/all/f10e976e-7a04-4454-b38d-39cd18f142da@roeck-us.net/
Fixes: bb1bd92fa0f2 ("staging: gpib: Add ines GPIB driver")
Fixes: e1339245eba3 ("staging: gpib: Add Computer Equipment Corporation GPIB driver")

Signed-off-by: Dave Penkler <dpenkler@...il.com>
---
v1 -> v2 changed pci_resource_start to pci_resource_len for second parameter of ioremap

 drivers/staging/gpib/cec/cec_gpib.c   | 3 ++-
 drivers/staging/gpib/ines/ines_gpib.c | 4 ++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/gpib/cec/cec_gpib.c b/drivers/staging/gpib/cec/cec_gpib.c
index 3dc933deb401..a1ea4d9e370a 100644
--- a/drivers/staging/gpib/cec/cec_gpib.c
+++ b/drivers/staging/gpib/cec/cec_gpib.c
@@ -297,7 +297,8 @@ int cec_pci_attach(gpib_board_t *board, const gpib_board_config_t *config)
 
 	cec_priv->plx_iobase = pci_resource_start(cec_priv->pci_device, 1);
 	pr_info(" plx9050 base address 0x%lx\n", cec_priv->plx_iobase);
-	nec_priv->iobase = (void *)(pci_resource_start(cec_priv->pci_device, 3));
+	nec_priv->iobase = ioremap(pci_resource_start(cec_priv->pci_device, 3),
+				   pci_resource_len(cec_priv->pci_device, 3));
 	pr_info(" nec7210 base address 0x%p\n", nec_priv->iobase);
 
 	isr_flags |= IRQF_SHARED;
diff --git a/drivers/staging/gpib/ines/ines_gpib.c b/drivers/staging/gpib/ines/ines_gpib.c
index 9d8387c3bf01..b5f8ea57fd9d 100644
--- a/drivers/staging/gpib/ines/ines_gpib.c
+++ b/drivers/staging/gpib/ines/ines_gpib.c
@@ -780,8 +780,8 @@ static int ines_common_pci_attach(gpib_board_t *board, const gpib_board_config_t
 
 	if (pci_request_regions(ines_priv->pci_device, "ines-gpib"))
 		return -1;
-	nec_priv->iobase = (void *)(pci_resource_start(ines_priv->pci_device,
-						       found_id.gpib_region));
+	nec_priv->iobase = ioremap(pci_resource_start(ines_priv->pci_device, found_id.gpib_region),
+				   pci_resource_len(ines_priv->pci_device, found_id.gpib_region));
 
 	ines_priv->pci_chip_type = found_id.pci_chip_type;
 	nec_priv->offset = found_id.io_offset;
-- 
2.46.2