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authorTejun Heo <htejun@gmail.com>2005-08-22 17:12:45 +0900
committerJeff Garzik <jgarzik@pobox.com>2005-08-23 01:05:55 -0400
commit40e8c82c74b9be793601e098fd1313bc2632c5dc (patch)
treeb3c89b2aaa5d477e8db5acc9bf4ee6f31acf3db8 /arch/sparc64/kernel/binfmt_aout32.c
parentc1389503710ef4b4e5d21bea284afde19e9619cf (diff)
[PATCH] libata: implement ata_poll_qc_complete and use it in polling functions
[PATCH libata-dev-2.6:upstream] implement ata_poll_qc_complete and use it in polling functions Previously, libata polling functions turned irq back on and completed qc commands without holding host lock. This creates a race condition between the polling task and interrupts from other ports on the same host set or spurious interrupt from itself. This patch implements ata_poll_qc_complete which enables irq and completes qc atomically and convert all polling functions. Note: atapi_packet_task() didn't use to turn irq back on or clear ATA_FLAG_NOINTR on error exits. This patch makes it use ata_poll_qc_complete which does both. Note: With this change, ALL invocations of ata_qc_complete() are now done under host_set lock. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'arch/sparc64/kernel/binfmt_aout32.c')
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