diff options
| author | Fabio Estevam <fabio.estevam@freescale.com> | 2013-02-21 09:21:50 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-02-21 15:37:49 -0500 |
| commit | 7f7d6c282e9d9b1721fdcdeac71383b7b0b60700 (patch) | |
| tree | c0e78760d7ba9c788a16cc687ae0aa3dd454e64c /drivers | |
| parent | b531ed61a2a2a77eeb2f7c88b49aa5ec7d9880d8 (diff) | |
| download | linux-7f7d6c282e9d9b1721fdcdeac71383b7b0b60700.tar.bz2 | |
net: fec: Ensure that initialization is done prior to request_irq()
Currently request_irq() is called prior to fec_enet_init() and fec_ptp_init(),
which causes the following crash on a mx53qsb:
Unable to handle kernel NULL pointer dereference at virtual address 00000002
pgd = 80004000
[00000002] *pgd=00000000
Internal error: Oops: 5 [#1] SMP ARM
Modules linked in:
CPU: 0 Not tainted (3.8.0-rc7-next-20130215+ #346)
PC is at fec_enet_interrupt+0xd0/0x348
LR is at fec_enet_interrupt+0xb8/0x348
pc : [<80372b7c>] lr : [<80372b64>] psr: 60000193
sp : df855c20 ip : df855c20 fp : df855c74
r10: 00000516 r9 : 1c000000 r8 : 00000000
r7 : 00000000 r6 : 00000000 r5 : 00000000 r4 : df9b7800
r3 : df9b7df4 r2 : 00000000 r1 : 00000000 r0 : df9b7d34
Ensure that such initialization functions are called prior to requesting the
interrupts, so that all necessary the data structures are in place when the
irqs occur.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/freescale/fec.c | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/drivers/net/ethernet/freescale/fec.c b/drivers/net/ethernet/freescale/fec.c index 29d82cf1528e..2dbb36c985c7 100644 --- a/drivers/net/ethernet/freescale/fec.c +++ b/drivers/net/ethernet/freescale/fec.c @@ -1782,6 +1782,15 @@ fec_probe(struct platform_device *pdev) fep->phy_interface = ret; } + fep->bufdesc_ex = + pdev->id_entry->driver_data & FEC_QUIRK_HAS_BUFDESC_EX; + if (fep->bufdesc_ex) + fec_ptp_init(ndev, pdev); + + ret = fec_enet_init(ndev); + if (ret) + goto failed_init; + for (i = 0; i < FEC_IRQ_NUM; i++) { irq = platform_get_irq(pdev, i); if (irq < 0) { @@ -1819,8 +1828,6 @@ fec_probe(struct platform_device *pdev) } fep->clk_ptp = devm_clk_get(&pdev->dev, "ptp"); - fep->bufdesc_ex = - pdev->id_entry->driver_data & FEC_QUIRK_HAS_BUFDESC_EX; if (IS_ERR(fep->clk_ptp)) { ret = PTR_ERR(fep->clk_ptp); fep->bufdesc_ex = 0; @@ -1843,13 +1850,6 @@ fec_probe(struct platform_device *pdev) fec_reset_phy(pdev); - if (fep->bufdesc_ex) - fec_ptp_init(ndev, pdev); - - ret = fec_enet_init(ndev); - if (ret) - goto failed_init; - ret = fec_enet_mii_init(pdev); if (ret) goto failed_mii_init; @@ -1866,7 +1866,6 @@ fec_probe(struct platform_device *pdev) failed_register: fec_enet_mii_remove(fep); failed_mii_init: -failed_init: failed_regulator: clk_disable_unprepare(fep->clk_ahb); clk_disable_unprepare(fep->clk_ipg); @@ -1881,6 +1880,7 @@ failed_clk: } failed_irq: iounmap(fep->hwp); +failed_init: failed_ioremap: free_netdev(ndev); failed_alloc_etherdev: @@ -1899,17 +1899,17 @@ fec_drv_remove(struct platform_device *pdev) unregister_netdev(ndev); fec_enet_mii_remove(fep); - for (i = 0; i < FEC_IRQ_NUM; i++) { - int irq = platform_get_irq(pdev, i); - if (irq > 0) - free_irq(irq, ndev); - } del_timer_sync(&fep->time_keep); clk_disable_unprepare(fep->clk_ptp); if (fep->ptp_clock) ptp_clock_unregister(fep->ptp_clock); clk_disable_unprepare(fep->clk_ahb); clk_disable_unprepare(fep->clk_ipg); + for (i = 0; i < FEC_IRQ_NUM; i++) { + int irq = platform_get_irq(pdev, i); + if (irq > 0) + free_irq(irq, ndev); + } iounmap(fep->hwp); free_netdev(ndev); |