* [BUG] renesas/ravb: two possible sleep-in-atomic bugs in ravb_set_link_ksettings and ravb_nway_reset
@ 2017-12-13 3:43 Jia-Ju Bai
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From: Jia-Ju Bai @ 2017-12-13 3:43 UTC (permalink / raw)
To: sergei.shtylyov, davem, horms+renesas, kazuya.mizuguchi.ks,
niklas.soderlund+renesas, geert+renesas, erosca, yuval.shaia
Cc: netdev, linux-renesas-soc,
linux-kernel@vger.kernel.org >> Linux Kernel Mailing List
Accoring to drivers/net/ethernet/renesas/ravb_main.c, the driver may
sleep under a spinlock.
The function call paths are:
ravb_set_link_ksettings (acquire the spinlock)
phy_ethtool_ksettings_set
phy_start_aneg
phy_start_aneg_priv
mutex_lock --> may sleep
ravb_nway_reset (acquire the spinlock)
phy_start_aneg
phy_start_aneg_priv
mutex_lock --> may sleep
I do not find a good way to fix them, so I only report.
These possible bugs are found by my static analysis tool (DSAC) and
checked by my code review.
Thanks,
Jia-Ju Bai
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2017-12-13 3:43 [BUG] renesas/ravb: two possible sleep-in-atomic bugs in ravb_set_link_ksettings and ravb_nway_reset Jia-Ju Bai
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