Messages in this thread Patch in this message | | | From | Kamal Mostafa <> | Subject | [PATCH 4.2.y-ckt 89/93] net: ethernet: davinci_emac: Fix platform_data overwrite | Date | Tue, 26 Apr 2016 11:17:29 -0700 |
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4.2.8-ckt9 -stable review patch. If anyone has any objections, please let me know.
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From: Neil Armstrong <narmstrong@baylibre.com>
commit 210990b05a1247886539078e857cd038881bb2d6 upstream.
When the DaVinci emac driver is removed and re-probed, the actual pdev->dev.platform_data is populated with an unwanted valid pointer saved by the previous davinci_emac_of_get_pdata() call, causing a kernel crash when calling priv->int_disable() in emac_int_disable().
Unable to handle kernel paging request at virtual address c8622a80 ... [<c0426fb4>] (emac_int_disable) from [<c0427700>] (emac_dev_open+0x290/0x5f8) [<c0427700>] (emac_dev_open) from [<c04c00ec>] (__dev_open+0xb8/0x120) [<c04c00ec>] (__dev_open) from [<c04c0370>] (__dev_change_flags+0x88/0x14c) [<c04c0370>] (__dev_change_flags) from [<c04c044c>] (dev_change_flags+0x18/0x48) [<c04c044c>] (dev_change_flags) from [<c052bafc>] (devinet_ioctl+0x6b4/0x7ac) [<c052bafc>] (devinet_ioctl) from [<c04a1428>] (sock_ioctl+0x1d8/0x2c0) [<c04a1428>] (sock_ioctl) from [<c014f054>] (do_vfs_ioctl+0x41c/0x600) [<c014f054>] (do_vfs_ioctl) from [<c014f2a4>] (SyS_ioctl+0x6c/0x7c) [<c014f2a4>] (SyS_ioctl) from [<c000ff60>] (ret_fast_syscall+0x0/0x1c)
Fixes: 42f59967a091 ("net: ethernet: davinci_emac: add OF support") Cc: Brian Hutchinson <b.hutchman@gmail.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- drivers/net/ethernet/ti/davinci_emac.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/drivers/net/ethernet/ti/davinci_emac.c b/drivers/net/ethernet/ti/davinci_emac.c index d5c5143..0ec6e2f 100644 --- a/drivers/net/ethernet/ti/davinci_emac.c +++ b/drivers/net/ethernet/ti/davinci_emac.c @@ -1877,8 +1877,6 @@ davinci_emac_of_get_pdata(struct platform_device *pdev, struct emac_priv *priv) pdata->hw_ram_addr = auxdata->hw_ram_addr; } - pdev->dev.platform_data = pdata; - return pdata; } -- 2.7.4
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