Messages in this thread | | | Date | Tue, 12 Dec 2017 10:22:40 -0800 | From | Stephen Hemminger <> | Subject | Re: [BUG] skge: a possible sleep-in-atomic bug in skge_remove |
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On Tue, 12 Dec 2017 08:34:45 -0500 (EST) David Miller <davem@davemloft.net> wrote:
> From: Jia-Ju Bai <baijiaju1990@gmail.com> > Date: Tue, 12 Dec 2017 16:38:12 +0800 > > > According to drivers/net/ethernet/marvell/skge.c, the driver may sleep > > under a spinlock. > > The function call path is: > > skge_remove (acquire the spinlock) > > free_irq --> may sleep > > > > I do not find a good way to fix it, so I only report. > > This possible bug is found by my static analysis tool (DSAC) and > > checked by my code review. > > This was added by: > > commit a9e9fd7182332d0cf5f3e601df3e71dd431b70d7 > Author: Stephen Hemminger <shemminger@vyatta.com> > Date: Tue Sep 27 13:41:37 2011 -0400 > > skge: handle irq better on single port card > > I think the free_irq() can be moved below the unlock. > > Stephen, please take a look.
The IRQ was being free twice. How did you see it, I really doubt any multi-port SKGE cards still exist.
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