Messages in this thread Patch in this message | | | From | Alexandre Bounine <> | Subject | [PATCH] rapidio/tsi721: fix bug in inbound doorbell handler | Date | Mon, 5 Mar 2012 15:33:05 -0500 |
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Fixes queue wrapping bug in Inbound Doorbell handling routine.
Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Cc: Chul Kim <chul.kim@idt.com> Cc: Matt Porter <mporter@kernel.crashing.org> --- This patch is applicable to kernel version 3.2 and after.
drivers/rapidio/devices/tsi721.c | 5 +++-- 1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/rapidio/devices/tsi721.c b/drivers/rapidio/devices/tsi721.c index babbede..c746e26 100644 --- a/drivers/rapidio/devices/tsi721.c +++ b/drivers/rapidio/devices/tsi721.c @@ -406,13 +406,14 @@ static void tsi721_db_dpc(struct work_struct *work) */ mport = priv->mport; - wr_ptr = ioread32(priv->regs + TSI721_IDQ_WP(IDB_QUEUE)); - rd_ptr = ioread32(priv->regs + TSI721_IDQ_RP(IDB_QUEUE)); + wr_ptr = ioread32(priv->regs + TSI721_IDQ_WP(IDB_QUEUE)) % IDB_QSIZE; + rd_ptr = ioread32(priv->regs + TSI721_IDQ_RP(IDB_QUEUE)) % IDB_QSIZE; while (wr_ptr != rd_ptr) { idb_entry = (u64 *)(priv->idb_base + (TSI721_IDB_ENTRY_SIZE * rd_ptr)); rd_ptr++; + rd_ptr %= IDB_QSIZE; idb.msg = *idb_entry; *idb_entry = 0; -- 1.7.8.4
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