linux-kernel - [PATCH 1/3] bsg: fix bsg_poll() to return POLLOUT properly

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Date:	Sun, 15 May 2011 14:31:51 +0900
From:	Namhyung Kim <namhyung@...il.com>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	Jens Axboe <axboe@...nel.dk>
Cc:	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] bsg: fix bsg_poll() to return POLLOUT properly

POLLOUT should be returned only if bd->queued_cmds < bd->max_queue
so that bsg_alloc_command() can proceed.

Signed-off-by: Namhyung Kim <namhyung@...il.com>
---
 block/bsg.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/block/bsg.c b/block/bsg.c
index 0c8b64a16484..c4f49e255751 100644
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -878,7 +878,7 @@ static unsigned int bsg_poll(struct file *file, poll_table *wait)
 	spin_lock_irq(&bd->lock);
 	if (!list_empty(&bd->done_list))
 		mask |= POLLIN | POLLRDNORM;
-	if (bd->queued_cmds >= bd->max_queue)
+	if (bd->queued_cmds < bd->max_queue)
 		mask |= POLLOUT;
 	spin_unlock_irq(&bd->lock);
 
-- 
1.7.5

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