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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-06-05 07:39:02 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-06-05 07:39:02 +0200 |
| commit | d37537a1f7cf09e304fe7993cb5e732534a0fb22 (patch) | |
| tree | f9894c8e18496941e28499b7fc1ccb01569db526 /drivers/usb/cdns3/cdns3-gadget.c | |
| parent | 243ff7e6a03533fd5f34036b4a2c297d844ffdc0 (diff) | |
| parent | 9561de3a55bed6bdd44a12820ba81ec416e705a7 (diff) | |
| download | linux-stable-d37537a1f7cf09e304fe7993cb5e732534a0fb22.tar.gz linux-stable-d37537a1f7cf09e304fe7993cb5e732534a0fb22.tar.bz2 linux-stable-d37537a1f7cf09e304fe7993cb5e732534a0fb22.zip | |
Merge 6.4-rc5 into usb-next
We need the USB fixes in here are well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/cdns3/cdns3-gadget.c')
| -rw-r--r-- | drivers/usb/cdns3/cdns3-gadget.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/usb/cdns3/cdns3-gadget.c b/drivers/usb/cdns3/cdns3-gadget.c index 27199198cc26..ea19253fd2d0 100644 --- a/drivers/usb/cdns3/cdns3-gadget.c +++ b/drivers/usb/cdns3/cdns3-gadget.c @@ -2098,6 +2098,19 @@ int cdns3_ep_config(struct cdns3_endpoint *priv_ep, bool enable) else priv_ep->trb_burst_size = 16; + /* + * In versions preceding DEV_VER_V2, for example, iMX8QM, there exit the bugs + * in the DMA. These bugs occur when the trb_burst_size exceeds 16 and the + * address is not aligned to 128 Bytes (which is a product of the 64-bit AXI + * and AXI maximum burst length of 16 or 0xF+1, dma_axi_ctrl0[3:0]). This + * results in data corruption when it crosses the 4K border. The corruption + * specifically occurs from the position (4K - (address & 0x7F)) to 4K. + * + * So force trb_burst_size to 16 at such platform. + */ + if (priv_dev->dev_ver < DEV_VER_V2) + priv_ep->trb_burst_size = 16; + mult = min_t(u8, mult, EP_CFG_MULT_MAX); buffering = min_t(u8, buffering, EP_CFG_BUFFERING_MAX); maxburst = min_t(u8, maxburst, EP_CFG_MAXBURST_MAX); |