From: Stephen Douthit <stephend@silicom-usa.com>
To: Tony Luck <tony.luck@intel.com>, Borislav Petkov <bp@alien8.de>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
James Morse <james.morse@arm.com>
Cc: Stephen Douthit <stephend@silicom-usa.com>,
"linux-edac@vger.kernel.org" <linux-edac@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: [PATCH] EDAC, pnd2: Fix ioremap() size in dnv_rd_reg()
Date: Fri, 9 Aug 2019 14:18:02 +0000 [thread overview]
Message-ID: <20190809141737.15580-1-stephend@silicom-usa.com> (raw)
Depending on how BIOS has marked the reserved region containing the 32KB
MCHBAR you can get warnings like:
resource sanity check: requesting [mem 0xfed10000-0xfed1ffff], which spans more than reserved [mem 0xfed10000-0xfed17fff]
caller dnv_rd_reg+0xc8/0x240 [pnd2_edac] mapping multiple BARs
Not all of the mmio regions used in dnv_rd_reg() are the same size. The
MCHBAR window is 32KB and the sideband ports are 64KB. Pass the correct
size to ioremap() depending on which resource we're reading from.
Signed-off-by: Stephen Douthit <stephend@silicom-usa.com>
---
drivers/edac/pnd2_edac.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/edac/pnd2_edac.c b/drivers/edac/pnd2_edac.c
index 903a4f1fadcc..0153c730750e 100644
--- a/drivers/edac/pnd2_edac.c
+++ b/drivers/edac/pnd2_edac.c
@@ -268,11 +268,14 @@ static u64 get_sideband_reg_base_addr(void)
}
}
+#define DNV_MCHBAR_SIZE 0x8000
+#define DNV_SB_PORT_SIZE 0x10000
static int dnv_rd_reg(int port, int off, int op, void *data, size_t sz, char *name)
{
struct pci_dev *pdev;
char *base;
u64 addr;
+ unsigned long size;
if (op == 4) {
pdev = pci_get_device(PCI_VENDOR_ID_INTEL, 0x1980, NULL);
@@ -287,15 +290,17 @@ static int dnv_rd_reg(int port, int off, int op, void *data, size_t sz, char *na
addr = get_mem_ctrl_hub_base_addr();
if (!addr)
return -ENODEV;
+ size = DNV_MCHBAR_SIZE;
} else {
/* MMIO via sideband register base address */
addr = get_sideband_reg_base_addr();
if (!addr)
return -ENODEV;
addr += (port << 16);
+ size = DNV_SB_PORT_SIZE;
}
- base = ioremap((resource_size_t)addr, 0x10000);
+ base = ioremap((resource_size_t)addr, size);
if (!base)
return -ENODEV;
--
2.21.0
next reply other threads:[~2019-08-09 14:18 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-09 14:18 Stephen Douthit [this message]
2019-08-09 17:25 ` [PATCH] EDAC, pnd2: Fix ioremap() size in dnv_rd_reg() Luck, Tony
2019-08-09 17:32 ` Borislav Petkov
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