linux-kernel - [PATCH 5/5] uas: Use GFP_NOIO instead of GFP

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Date:	Wed, 15 Dec 2010 15:44:06 -0500
From:	matthew@....cx
To:	Greg KH <greg@...ah.com>
Cc:	linux-usb@...r.kernel.org, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org, Matthew Wilcox <matthew@....cx>,
	Matthew Wilcox <willy@...ux.intel.com>
Subject: [PATCH 5/5] uas: Use GFP_NOIO instead of GFP_KERNEL in I/O submission path

From: Matthew Wilcox <matthew@....cx>

If swap is on a UAS device, we could recurse into the driver by using
GFP_KERNEL.  Using GFP_NOIO ensures we won't.

Reported-by: James Bottomley <James.Bottomley@...e.de>
Signed-off-by: Matthew Wilcox <willy@...ux.intel.com>
---
 drivers/usb/storage/uas.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
index 0ebe7f6..23f0dd9 100644
--- a/drivers/usb/storage/uas.c
+++ b/drivers/usb/storage/uas.c
@@ -141,7 +141,7 @@ static void uas_do_work(struct work_struct *work)
 		struct scsi_pointer *scp = (void *)cmdinfo;
 		struct scsi_cmnd *cmnd = container_of(scp,
 							struct scsi_cmnd, SCp);
-		uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_KERNEL);
+		uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_NOIO);
 	}
 }
 
-- 
1.7.2.3

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