From e7eda9329372f5e436e5a9291eb115eab0feae02 Mon Sep 17 00:00:00 2001
From: Oliver Neukum <oneukum@suse.de>
Date: Fri, 28 Mar 2014 11:10:30 +0100
Subject: [PATCH] uas: fix GFP_NOIO under spinlock
Quote Dan:
The patch e36e64930cff: "uas: Use GFP_NOIO rather then GFP_ATOMIC
where possible" from Nov 7, 2013, leads to the following static
checker warning:
drivers/usb/storage/uas.c:806 uas_eh_task_mgmt()
error: scheduling with locks held: 'spin_lock:lock'
Some other allocations under spinlock are not caught.
The fix essentially reverts e36e64930cffd94e1c37fdb82f35989384aa946b
Signed-off-by: Oliver Neukum <oliver@neukum.org>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/storage/uas.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
index a7ac97cc5949..8f4222640bd6 100644
--- a/drivers/usb/storage/uas.c
+++ b/drivers/usb/storage/uas.c
@@ -137,7 +137,7 @@ static void uas_do_work(struct work_struct *work)
if (!(cmdinfo->state & IS_IN_WORK_LIST))
continue;
- err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_NOIO);
+ err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC);
if (!err)
cmdinfo->state &= ~IS_IN_WORK_LIST;
else
@@ -803,7 +803,7 @@ static int uas_eh_task_mgmt(struct scsi_cmnd *cmnd,
devinfo->running_task = 1;
memset(&devinfo->response, 0, sizeof(devinfo->response));
- sense_urb = uas_submit_sense_urb(cmnd, GFP_NOIO,
+ sense_urb = uas_submit_sense_urb(cmnd, GFP_ATOMIC,
devinfo->use_streams ? tag : 0);
if (!sense_urb) {
shost_printk(KERN_INFO, shost,
@@ -813,7 +813,7 @@ static int uas_eh_task_mgmt(struct scsi_cmnd *cmnd,
spin_unlock_irqrestore(&devinfo->lock, flags);
return FAILED;
}
- if (uas_submit_task_urb(cmnd, GFP_NOIO, function, tag)) {
+ if (uas_submit_task_urb(cmnd, GFP_ATOMIC, function, tag)) {
shost_printk(KERN_INFO, shost,
"%s: %s: submit task mgmt urb failed\n",
__func__, fname);
--
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