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mt7601u: do not free dma_buf when ivp allocation fails 

If the allocation of ivp fails the error handling attempts to
free an uninitialized dma_buf; this data structure just contains
garbage on the stack, so the freeing will cause issues when the
urb, buf and dma fields are free'd. Fix this by not free'ing the
dma_buf if the ivp allocation fails.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Julian Calaby <julian.calaby@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Colin Ian King 2016-02-25 23:24:27 +00:00 committed by Kalle Valo
parent 354a1947a0
commit 2b02a36d12
1 changed files with 3 additions and 1 deletions
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4
drivers/net/wireless/mediatek/mt7601u/mcu.c
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@ -362,7 +362,9 @@ mt7601u_upload_firmware(struct mt7601u_dev *dev, const struct mt76_fw *fw)
int i, ret;
ivb = kmemdup(fw->ivb, sizeof(fw->ivb), GFP_KERNEL);
if (!ivb || mt7601u_usb_alloc_buf(dev, MCU_FW_URB_SIZE, &dma_buf)) {
if (!ivb)
return -ENOMEM;
if (mt7601u_usb_alloc_buf(dev, MCU_FW_URB_SIZE, &dma_buf)) {
ret = -ENOMEM;
goto error;
}