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sky2: Disable MSI on Dell Inspiron 1545 and Gateway P-79 

Some sky2 chips fire IRQ after S3, before the driver is fully resumed:
[ 686.804877] do_IRQ: 1.37 No irq handler for vector

This is likely a platform bug that device isn't fully quiesced during
S3. Use MSI-X, maskable MSI or INTx can prevent this issue from
happening.

Since MSI-X and maskable MSI are not supported by this device, fallback
to use INTx on affected platforms.

BugLink: https://bugs.launchpad.net/bugs/1807259
BugLink: https://bugs.launchpad.net/bugs/1809843
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kai-Heng Feng 2019-03-04 15:00:03 +08:00 committed by David S. Miller
parent d6089c7418
commit b33b7cd6fd
1 changed files with 23 additions and 1 deletions
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24
drivers/net/ethernet/marvell/sky2.c
View File

@ -46,6 +46,7 @@
#include <linux/mii.h>
#include <linux/of_device.h>
#include <linux/of_net.h>
#include <linux/dmi.h>
#include <asm/irq.h>
@ -93,7 +94,7 @@ static int copybreak __read_mostly = 128;
module_param(copybreak, int, 0);
MODULE_PARM_DESC(copybreak, "Receive copy threshold");
static int disable_msi = 0;
static int disable_msi = -1;
module_param(disable_msi, int, 0);
MODULE_PARM_DESC(disable_msi, "Disable Message Signaled Interrupt (MSI)");
@ -4917,6 +4918,24 @@ static const char *sky2_name(u8 chipid, char *buf, int sz)
return buf;
}
static const struct dmi_system_id msi_blacklist[] = {
{
.ident = "Dell Inspiron 1545",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1545"),
},
},
{
.ident = "Gateway P-79",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Gateway"),
DMI_MATCH(DMI_PRODUCT_NAME, "P-79"),
},
},
{}
};
static int sky2_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct net_device *dev, *dev1;
@ -5028,6 +5047,9 @@ static int sky2_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
goto err_out_free_pci;
}
if (disable_msi == -1)
disable_msi = !!dmi_check_system(msi_blacklist);
if (!disable_msi && pci_enable_msi(pdev) == 0) {
err = sky2_test_msi(hw);
if (err) {