Hello Christian Gromm,
The patch a4198cdf0c34: "Staging: most: add MOST driver's hdm-usb
module" from Jul 24, 2015, leads to the following static checker
warning:
drivers/staging/most/hdm-usb/hdm_usb.c:147 trigger_resync_vr()
error: doing dma on the stack (&data)
drivers/staging/most/hdm-usb/hdm_usb.c
143 static inline void trigger_resync_vr(struct usb_device *dev)
144 {
145 int data = 0;
146
147 if (0 > usb_control_msg(dev,
^^^^^^^^^^^^^^^^^^^^
The Yoda code here is totally weirding me out.
148 usb_sndctrlpipe(dev, 0),
149 0,
150 USB_DIR_OUT | USB_TYPE_VENDOR |
USB_RECIP_ENDPOINT,
151 0,
152 0,
153 &data,
^^^^
Some arches don't allow DMA to the stack, only to kmalloc()ed memory.
154 0,
155 5 * HZ))
156 pr_info("Vendor request \"stall\" failed\n");
157 }
regards,
dan carpenter
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