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authorDoug Berger <opendmb@gmail.com>2024-04-26 01:27:21 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2024-05-17 13:15:04 +0300
commit74022f08e03da2dbf61bd7dd5dcffcc1f0cfbc58 (patch)
tree8c1cbf0659bee8659cef0fd78e08ad68974e1080 /lib/dynamic_debug.c
parentda108f4d4291d87b20b0c88eb13976cc8ca9e407 (diff)
downloadlinux-74022f08e03da2dbf61bd7dd5dcffcc1f0cfbc58.tar.xz
net: bcmgenet: synchronize UMAC_CMD access
commit 0d5e2a82232605b337972fb2c7d0cbc46898aca1 upstream. The UMAC_CMD register is written from different execution contexts and has insufficient synchronization protections to prevent possible corruption. Of particular concern are the acceses from the phy_device delayed work context used by the adjust_link call and the BH context that may be used by the ndo_set_rx_mode call. A spinlock is added to the driver to protect contended register accesses (i.e. reg_lock) and it is used to synchronize accesses to UMAC_CMD. Fixes: 1c1008c793fa ("net: bcmgenet: add main driver file") Cc: stable@vger.kernel.org Signed-off-by: Doug Berger <opendmb@gmail.com> Acked-by: Florian Fainelli <florian.fainelli@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib/dynamic_debug.c')
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