linux-kernel - [PATCH] usb: gadget: f_mass_storage: restore address range on exit

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Message-Id: <1417778490-20723-1-git-send-email-snjsrwt@gmail.com>
Date:	Fri,  5 Dec 2014 16:51:30 +0530
From:	Sanjay Singh Rawat <snjsrwt@...il.com>
To:	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	balbi@...com, andrzej.p@...sung.com, mina86@...a86.com,
	Sanjay Singh Rawat <snjsrwt@...il.com>
Subject: [PATCH] usb: gadget: f_mass_storage: restore address range on exit

At the start of the thread we are changing the address limit, restoring it
to the default while exiting.

Signed-off-by: Sanjay Singh Rawat <snjsrwt@...il.com>
---
 drivers/usb/gadget/function/f_mass_storage.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/gadget/function/f_mass_storage.c b/drivers/usb/gadget/function/f_mass_storage.c
index 811929c..c4a2ded 100644
--- a/drivers/usb/gadget/function/f_mass_storage.c
+++ b/drivers/usb/gadget/function/f_mass_storage.c
@@ -2489,6 +2489,7 @@ static void handle_exception(struct fsg_common *common)
 static int fsg_main_thread(void *common_)
 {
 	struct fsg_common	*common = common_;
+	mm_segment_t fs = get_fs();
 
 	/*
 	 * Allow the thread to be killed by a signal, but set the signal mask
@@ -2567,6 +2568,7 @@ static int fsg_main_thread(void *common_)
 		up_write(&common->filesem);
 	}
 
+	set_fs(fs);
 	/* Let fsg_unbind() know the thread has exited */
 	complete_and_exit(&common->thread_notifier, 0);
 }
-- 
1.8.3.2

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