From: Bo Shen <voice.shen@atmel.com>
Date: Wed, 17 Dec 2014 09:18:49 +0000 (+0800)
Subject: usb: gadget: udc: atmel: fix possible IN hang issue
X-Git-Tag: fixes-v4.0-rc1~286^2~18^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6785a1034461c2d2c205215f63a50a740896e55b;p=pandora-kernel.git

usb: gadget: udc: atmel: fix possible IN hang issue

When receive data, the RXRDY in status register set by hardware
after a new packet has been stored in the endpoint FIFO. When it
is copied from FIFO, this bit is cleared which make the FIFO can
be accessed again.

In the receive_data() function, this bit RXRDY has been cleared.
So, after the receive_data() function return, this bit should
not be cleared again, or else it may cause the accessing FIFO
corrupt, which will make the data loss.

Fixes: 914a3f3b3754 (USB: add atmel_usba_udc driver)
Cc: <stable@vger.kernel.org> # 2.6.24+
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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