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mtip32xx: fix for driver hang after a command timeout 

If an I/O command times out when a PIO command is active,
MTIP_PF_EH_ACTIVE_BIT is not cleared. This results in I/O
hang in the driver. Fix is to clear this bit.

Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Asai Thambi S P 2013-01-11 18:46:04 +05:30 committed by Jens Axboe
parent b6c46cfa31
commit 47cd4b3c7e
1 changed files with 5 additions and 4 deletions
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9
drivers/block/mtip32xx/mtip32xx.c
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@ -626,12 +626,13 @@ static void mtip_timeout_function(unsigned long int data)
}
}
if (cmdto_cnt && !test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags)) {
if (cmdto_cnt) {
print_tags(port->dd, "timed out", tagaccum, cmdto_cnt);
mtip_restart_port(port);
if (!test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags)) {
mtip_restart_port(port);
wake_up_interruptible(&port->svc_wait);
}
clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
wake_up_interruptible(&port->svc_wait);
}
if (port->ic_pause_timer) {