From: Mauro Carvalho Chehab Date: Tue, 14 Feb 2017 19:47:57 +0000 (-0200) Subject: siano: make it work again with CONFIG_VMAP_STACK X-Git-Tag: v3.2.87~54 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f606625da3b0a360a61e730a3dd85a0c576ebb3a;p=pandora-kernel.git siano: make it work again with CONFIG_VMAP_STACK commit f9c85ee67164b37f9296eab3b754e543e4e96a1c upstream. Reported as a Kaffeine bug: https://bugs.kde.org/show_bug.cgi?id=375811 The USB control messages require DMA to work. We cannot pass a stack-allocated buffer, as it is not warranted that the stack would be into a DMA enabled area. On Kernel 4.9, the default is to not accept DMA on stack anymore on x86 architecture. On other architectures, this has been a requirement since Kernel 2.2. So, after this patch, this driver should likely work fine on all archs. Tested with USB ID 2040:5510: Hauppauge Windham Signed-off-by: Mauro Carvalho Chehab [bwh: Backported to 3.2: - s/sms_msg_hdr/SmsMsgHdr_ST/ - Adjust filename, context] Signed-off-by: Ben Hutchings --- Reading git-diff-tree failed