Apologies for the noise, but it looks like Arnd has already send a patch for this.
http://www.spinics.net/lists/netdev/msg306603.html Dinh On 12/1/14, 2:00 PM, [email protected] wrote: > From: Dinh Nguyen <[email protected]> > > The commit 571dcfde23712b ("stmmac: platform: fix default values of the filter > bins setting") broke support for stmmac probe for all CONFIG_OF platforms. > > [ 0.743567] Unable to handle kernel NULL pointer dereference at virtual > address 00000048 > [ 0.751679] pgd = c0004000 > [ 0.754384] [00000048] *pgd=00000000 > [ 0.757983] Internal error: Oops: 805 [#1] SMP ARM > [ 0.762774] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.18.0-rc7 #1 > [ 0.769034] task: ee86c000 ti: ee870000 task.ti: ee870000 > [ 0.774429] PC is at stmmac_pltfr_probe+0x40/0x5d0 > [ 0.779217] LR is at devm_ioremap_nocache+0x54/0x74 > ... > [ 0.951644] [<c0287938>] (stmmac_pltfr_probe) from [<c0234c4c>] > (platform_drv_probe+0x44/0xa4) > [ 0.960250] [<c0234c4c>] (platform_drv_probe) from [<c023390c>] > (driver_probe_device+0x10c/0x240) > [ 0.969113] [<c023390c>] (driver_probe_device) from [<c0233b10>] > (__driver_attach+0x8c/0x90) > [ 0.977544] [<c0233b10>] (__driver_attach) from [<c02320fc>] > (bus_for_each_dev+0x6c/0xa0) > > The reason is that in stmmac_pltfr_probe(), the plat_dat on a CONFIG_OF > platform is NULL until devm_kzalloc() is called to allocate plat_dat. > > Signed-off-by: Dinh Nguyen <[email protected]> > --- > drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 12 ++++++------ > 1 file changed, 6 insertions(+), 6 deletions(-) > > diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c > b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c > index 5b0da39..62c9e75 100644 > --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c > +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c > @@ -265,12 +265,6 @@ static int stmmac_pltfr_probe(struct platform_device > *pdev) > > plat_dat = dev_get_platdata(&pdev->dev); > > - /* Set default value for multicast hash bins */ > - plat_dat->multicast_filter_bins = HASH_TABLE_SIZE; > - > - /* Set default value for unicast filter entries */ > - plat_dat->unicast_filter_entries = 1; > - > if (pdev->dev.of_node) { > if (!plat_dat) > plat_dat = devm_kzalloc(&pdev->dev, > @@ -288,6 +282,12 @@ static int stmmac_pltfr_probe(struct platform_device > *pdev) > } > } > > + /* Set default value for multicast hash bins */ > + plat_dat->multicast_filter_bins = HASH_TABLE_SIZE; > + > + /* Set default value for unicast filter entries */ > + plat_dat->unicast_filter_entries = 1; > + > /* Custom setup (if needed) */ > if (plat_dat->setup) { > plat_dat->bsp_priv = plat_dat->setup(pdev); > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
