This is a note to let you know that I've just added the patch titled usb: musb: cppi41: allow it to work again to the 4.2-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: usb-musb-cppi41-allow-it-to-work-again.patch and it can be found in the queue-4.2 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From b0a688ddcc5015eb26000c63841db7c46cfb380a Mon Sep 17 00:00:00 2001 From: Felipe Balbi <balbi@xxxxxx> Date: Thu, 6 Aug 2015 10:51:29 -0500 Subject: usb: musb: cppi41: allow it to work again From: Felipe Balbi <balbi@xxxxxx> commit b0a688ddcc5015eb26000c63841db7c46cfb380a upstream. since commit 33c300cb90a6 ("usb: musb: dsps: don't fake of_node to musb core") we have been preventing CPPI 4.1 from probing due to NULL of_node. We can't revert said commit otherwise a different regression would show up, so the fix is to look for the parent device's (glue layer's) of_node instead, since that's the thing which is actually described in DTS. Signed-off-by: Felipe Balbi <balbi@xxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/usb/musb/musb_cppi41.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/drivers/usb/musb/musb_cppi41.c +++ b/drivers/usb/musb/musb_cppi41.c @@ -614,7 +614,7 @@ static int cppi41_dma_controller_start(s { struct musb *musb = controller->musb; struct device *dev = musb->controller; - struct device_node *np = dev->of_node; + struct device_node *np = dev->parent->of_node; struct cppi41_dma_channel *cppi41_channel; int count; int i; @@ -664,7 +664,7 @@ static int cppi41_dma_controller_start(s musb_dma->status = MUSB_DMA_STATUS_FREE; musb_dma->max_len = SZ_4M; - dc = dma_request_slave_channel(dev, str); + dc = dma_request_slave_channel(dev->parent, str); if (!dc) { dev_err(dev, "Failed to request %s.\n", str); ret = -EPROBE_DEFER; @@ -695,7 +695,7 @@ cppi41_dma_controller_create(struct musb struct cppi41_dma_controller *controller; int ret = 0; - if (!musb->controller->of_node) { + if (!musb->controller->parent->of_node) { dev_err(musb->controller, "Need DT for the DMA engine.\n"); return NULL; } Patches currently in stable-queue which might be from balbi@xxxxxx are queue-4.2/usb-chipidea-udc-using-the-correct-stall-implementation.patch queue-4.2/usb-musb-dsps-fix-polling-in-device-only-mode.patch queue-4.2/usb-musb-cppi41-allow-it-to-work-again.patch queue-4.2/usb-phy-phy-generic-fix-reset-behaviour-on-legacy-boot.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html