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| author |   Jia-Ju Bai <baijiaju1990@gmail.com> | 2018-09-01 20:11:05 +0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-09-02 16:05:25 -0700 |
| commit | 16fe10cf92783ed9ceb182d6ea2b8adf5e8ec1b8 (patch) | |
| tree | dc652a85653af60c212ca20262c6d01e092a946d /drivers/net/ethernet/jme.h | |
| parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf (diff) | |
| download | linux-dev-16fe10cf92783ed9ceb182d6ea2b8adf5e8ec1b8.tar.xz linux-dev-16fe10cf92783ed9ceb182d6ea2b8adf5e8ec1b8.zip | |
net: cadence: Fix a sleep-in-atomic-context bug in macb_halt_tx()
The kernel module may sleep with holding a spinlock.
The function call paths (from bottom to top) in Linux-4.16 are:
[FUNC] usleep_range
drivers/net/ethernet/cadence/macb_main.c, 648:
usleep_range in macb_halt_tx
drivers/net/ethernet/cadence/macb_main.c, 730:
macb_halt_tx in macb_tx_error_task
drivers/net/ethernet/cadence/macb_main.c, 721:
_raw_spin_lock_irqsave in macb_tx_error_task
To fix this bug, usleep_range() is replaced with udelay().
This bug is found by my static analysis tool DSAC.
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/jme.h')
0 files changed, 0 insertions, 0 deletions