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authorRabin Vincent <rabin.vincent@stericsson.com>2012-01-17 11:52:28 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2012-01-24 16:09:55 -0800
commitef605fdb33883d687cff5ba75095a91b313b4966 (patch)
tree7eea2b5b397d0b5373ec76035bf924d3885b2489 /drivers/net/ethernet/mipsnet.c
parentd8d8ffa477831b713ddfa2ad4d0ca545f3b567e5 (diff)
serial: amba-pl011: lock console writes against interrupts
Protect against pl011_console_write() and the interrupt for the console UART running concurrently on different CPUs. Otherwise the console_write could spin for a long time waiting for the UART to become not busy, while the other CPU continuously services UART interrupts and keeps the UART busy. The checks for sysrq and oops_in_progress are taken from 8250.c. Cc: stable <stable@vger.kernel.org> Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com> Reviewed-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> Reviewed-by: Bibek Basu <bibek.basu@stericsson.com> Reviewed-by: Shreshtha Kumar Sahu <shreshthakumar.sahu@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/net/ethernet/mipsnet.c')
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