diff options
| -rw-r--r-- | drivers/usb/dwc2/core.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c index ea0048a724cf..d9269459d481 100644 --- a/drivers/usb/dwc2/core.c +++ b/drivers/usb/dwc2/core.c @@ -2743,6 +2743,13 @@ int dwc2_get_hwparams(struct dwc2_hsotg *hsotg) width = (hwcfg3 & GHWCFG3_XFER_SIZE_CNTR_WIDTH_MASK) >> GHWCFG3_XFER_SIZE_CNTR_WIDTH_SHIFT; hw->max_transfer_size = (1 << (width + 11)) - 1; + /* + * Clip max_transfer_size to 65535. dwc2_hc_setup_align_buf() allocates + * coherent buffers with this size, and if it's too large we can + * exhaust the coherent DMA pool. + */ + if (hw->max_transfer_size > 65535) + hw->max_transfer_size = 65535; width = (hwcfg3 & GHWCFG3_PACKET_SIZE_CNTR_WIDTH_MASK) >> GHWCFG3_PACKET_SIZE_CNTR_WIDTH_SHIFT; hw->max_packet_count = (1 << (width + 4)) - 1; |