diff options
Diffstat (limited to 'target/linux/octeon/patches-3.10/0007-MIPS-Octeon-ethernet-irq-enable.patch')
| -rw-r--r-- | target/linux/octeon/patches-3.10/0007-MIPS-Octeon-ethernet-irq-enable.patch | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/target/linux/octeon/patches-3.10/0007-MIPS-Octeon-ethernet-irq-enable.patch b/target/linux/octeon/patches-3.10/0007-MIPS-Octeon-ethernet-irq-enable.patch new file mode 100644 index 0000000000..ea9a28a211 --- /dev/null +++ b/target/linux/octeon/patches-3.10/0007-MIPS-Octeon-ethernet-irq-enable.patch @@ -0,0 +1,81 @@ +From patchwork Thu Sep 5 18:44:01 2013 +Content-Type: text/plain; charset="utf-8" +MIME-Version: 1.0 +Content-Transfer-Encoding: 7bit +Subject: [3/3] staging: octeon-ethernet: rgmii: enable interrupts that we can + handle +From: Aaro Koskinen <aaro.koskinen@iki.fi> +X-Patchwork-Id: 5810 +Message-Id: <1378406641-16530-4-git-send-email-aaro.koskinen@iki.fi> +To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>, + devel@driverdev.osuosl.org, linux-mips@linux-mips.org +Cc: David Daney <david.daney@cavium.com>, + "Jason A. Donenfeld" <Jason@zx2c4.com>, richard@nod.at, + Aaro Koskinen <aaro.koskinen@iki.fi> +Date: Thu, 5 Sep 2013 21:44:01 +0300 + +Enable only those interrupts that we can handle & acknowledge in the +interrupt handler. + +At least on EdgeRouter Lite, the hardware may occasionally interrupt with +some error condition when the physical link status changes frequently. +Since the interrupt condition is not acked properly, this leads to the +following warning and the IRQ gets disabled completely: + +[ 41.324700] eth0: Link down +[ 44.324721] eth0: 1000 Mbps Full duplex, port 0, queue 0 +[ 44.885590] irq 117: nobody cared (try booting with the "irqpoll" option) +[ 44.892397] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.11.0-rc5-edge-los.git-27d042f-dirty-00950-gaa42f2d-dirty #8 +[ 44.902825] Stack : ffffffff815c0000 0000000000000004 0000000000000003 0000000000000000 + ffffffff81fd0000 ffffffff815c0000 0000000000000004 ffffffff8118530c + ffffffff815c0000 ffffffff811858d8 0000000000000000 0000000000000000 + ffffffff81fd0000 ffffffff81fc0000 ffffffff8152f3a0 ffffffff815b7bf7 + ffffffff81fc6688 ffffffff815b8060 0000000000000000 0000000000000000 + 0000000000000000 ffffffff815346c8 ffffffff815346b0 ffffffff814a6a18 + ffffffff8158b848 ffffffff81145614 ffffffff81593800 ffffffff81187174 + ffffffff815b7d00 ffffffff8158b760 0000000000000000 ffffffff814a9184 + 0000000000000000 0000000000000000 0000000000000000 0000000000000000 + 0000000000000000 ffffffff811203b8 0000000000000000 0000000000000000 + ... +[ 44.968408] Call Trace: +[ 44.970873] [<ffffffff811203b8>] show_stack+0x68/0x80 +[ 44.975937] [<ffffffff814a9184>] dump_stack+0x78/0xb8 +[ 44.980999] [<ffffffff811aac54>] __report_bad_irq+0x44/0x108 +[ 44.986662] [<ffffffff811ab238>] note_interrupt+0x248/0x2a0 +[ 44.992240] [<ffffffff811a85e4>] handle_irq_event_percpu+0x144/0x200 +[ 44.998598] [<ffffffff811a86f4>] handle_irq_event+0x54/0x90 +[ 45.004176] [<ffffffff811ab908>] handle_level_irq+0xd0/0x148 +[ 45.009839] [<ffffffff811a7b04>] generic_handle_irq+0x34/0x50 +[ 45.015589] [<ffffffff8111dae8>] do_IRQ+0x18/0x30 +[ 45.020301] [<ffffffff8110486c>] plat_irq_dispatch+0x74/0xb8 +[ 45.025958] +[ 45.027451] handlers: +[ 45.029731] [<ffffffff813fca10>] cvm_oct_rgmii_rml_interrupt +[ 45.035397] Disabling IRQ #117 +[ 45.038742] Port 0 receive error code 13, packet dropped +[ 46.324719] eth0: Link down +[ 48.324733] eth0: 1000 Mbps Full duplex, port 0, queue 0 + +Reported-by: "Jason A. Donenfeld" <Jason@zx2c4.com> +Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> +Acked-by: David Daney <david.daney@cavium.com> + +--- +drivers/staging/octeon/ethernet-rgmii.c | 4 +--- + 1 file changed, 1 insertion(+), 3 deletions(-) + +diff --git a/drivers/staging/octeon/ethernet-rgmii.c b/drivers/staging/octeon/ethernet-rgmii.c +index d8f5f69..ea53af3 100644 +--- a/drivers/staging/octeon/ethernet-rgmii.c ++++ b/drivers/staging/octeon/ethernet-rgmii.c +@@ -373,9 +373,7 @@ int cvm_oct_rgmii_init(struct net_device *dev) + * Enable interrupts on inband status changes + * for this port. + */ +- gmx_rx_int_en.u64 = +- cvmx_read_csr(CVMX_GMXX_RXX_INT_EN +- (index, interface)); ++ gmx_rx_int_en.u64 = 0; + gmx_rx_int_en.s.phy_dupx = 1; + gmx_rx_int_en.s.phy_link = 1; + gmx_rx_int_en.s.phy_spd = 1; |