Patchwork [3.8.y.z,extended,stable] Patch "xhci: check for failed dma pool allocation" has been added to staging queue

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Submitter Luis Henriques
Date July 9, 2013, 4:28 p.m.
Message ID <1373387303-21471-1-git-send-email-luis.henriques@canonical.com>
Download mbox | patch
Permalink /patch/257774/
State New
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Comments

Luis Henriques - July 9, 2013, 4:28 p.m.
This is a note to let you know that I have just added a patch titled

    xhci: check for failed dma pool allocation

to the linux-3.8.y-queue branch of the 3.8.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.8.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.8.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

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From 30dcb1b770a10f730738b177ca403a4058bc2995 Mon Sep 17 00:00:00 2001
From: Mathias Nyman <mathias.nyman@linux.intel.com>
Date: Mon, 17 Jun 2013 09:56:33 -0700
Subject: [PATCH] xhci: check for failed dma pool allocation

commit 025f880cb2e4d7218d0422d4b07bea1a68959c38 upstream.

Fail and free the container context in case dma_pool_alloc() can't allocate
the raw context data part of it

This patch should be backported to kernels as old as 2.6.31, that
contain the commit d115b04818e57bdbc7ccde4d0660b15e33013dc8 "USB: xhci:
Support for 64-byte contexts".

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: John Youn <johnyoun@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/usb/host/xhci-mem.c | 4 ++++
 1 file changed, 4 insertions(+)

--
1.8.1.2

Patch

diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 0618f25..1ffbbfb 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -369,6 +369,10 @@  static struct xhci_container_ctx *xhci_alloc_container_ctx(struct xhci_hcd *xhci
 		ctx->size += CTX_SIZE(xhci->hcc_params);

 	ctx->bytes = dma_pool_alloc(xhci->device_pool, flags, &ctx->dma);
+	if (!ctx->bytes) {
+		kfree(ctx);
+		return NULL;
+	}
 	memset(ctx->bytes, 0, ctx->size);
 	return ctx;
 }