ACK: [B/C] [PATCH 1/1] sky2: Disable MSI on Dell Inspiron 1545 and Gateway P-79
Kleber Souza
kleber.souza at canonical.com
Wed Jun 26 16:47:35 UTC 2019
On 6/13/19 7:31 PM, Kai-Heng Feng wrote:
> 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 at canonical.com>
> Signed-off-by: David S. Miller <davem at davemloft.net>
> (cherry picked from commit b33b7cd6fd86478dd2890a9abeb6f036aa01fdf7)
> Signed-off-by: Kai-Heng Feng <kai.heng.feng at canonical.com>
As mentioned, already in Disco for some time.
Acked-by: Kleber Sacilotto de Souza <kleber.souza at canonical.com>
Thank you,
Kleber
> ---
> drivers/net/ethernet/marvell/sky2.c | 24 +++++++++++++++++++++++-
> 1 file changed, 23 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
> index ae2f35039343..1485f66cf7b0 100644
> --- a/drivers/net/ethernet/marvell/sky2.c
> +++ b/drivers/net/ethernet/marvell/sky2.c
> @@ -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)");
>
> @@ -4931,6 +4932,24 @@ 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;
> @@ -5042,6 +5061,9 @@ 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) {
>
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