From: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx> commit eb7f8e28420372787933eec079735c35034bda7d upstream. rtsx_usb driver allocates coherent dma buffer for urb transfers. This buffer is passed to usb_bulk_msg() and usb core tries to map already mapped buffer running into a dma mapping error. xhci_hcd 0000:01:00.0: rejecting DMA map of vmalloc memory WARNING: CPU: 1 PID: 279 at include/linux/dma-mapping.h:326 usb_ hcd_map_urb_for_dma+0x7d6/0x820 ... xhci_map_urb_for_dma+0x291/0x4e0 usb_hcd_submit_urb+0x199/0x12b0 ... usb_submit_urb+0x3b8/0x9e0 usb_start_wait_urb+0xe3/0x2d0 usb_bulk_msg+0x115/0x240 rtsx_usb_transfer_data+0x185/0x1a8 [rtsx_usb] rtsx_usb_send_cmd+0xbb/0x123 [rtsx_usb] rtsx_usb_write_register+0x12c/0x143 [rtsx_usb] rtsx_usb_probe+0x226/0x4b2 [rtsx_usb] Fix it to use kmalloc() to get DMA-able memory region instead. Signed-off-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx> Cc: stable <stable@xxxxxxxxxx> Link: https://lore.kernel.org/r/667d627d502e1ba9ff4f9b94966df3299d2d3c0d.1656642167.git.skhan@xxxxxxxxxxxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/misc/cardreader/rtsx_usb.c | 13 +++++++------ include/linux/rtsx_usb.h | 1 - 2 files changed, 7 insertions(+), 7 deletions(-) --- a/drivers/misc/cardreader/rtsx_usb.c +++ b/drivers/misc/cardreader/rtsx_usb.c @@ -631,8 +631,7 @@ static int rtsx_usb_probe(struct usb_int ucr->pusb_dev = usb_dev; - ucr->iobuf = usb_alloc_coherent(ucr->pusb_dev, IOBUF_SIZE, - GFP_KERNEL, &ucr->iobuf_dma); + ucr->iobuf = kmalloc(IOBUF_SIZE, GFP_KERNEL); if (!ucr->iobuf) return -ENOMEM; @@ -668,8 +667,9 @@ static int rtsx_usb_probe(struct usb_int out_init_fail: usb_set_intfdata(ucr->pusb_intf, NULL); - usb_free_coherent(ucr->pusb_dev, IOBUF_SIZE, ucr->iobuf, - ucr->iobuf_dma); + kfree(ucr->iobuf); + ucr->iobuf = NULL; + ucr->cmd_buf = ucr->rsp_buf = NULL; return ret; } @@ -682,8 +682,9 @@ static void rtsx_usb_disconnect(struct u mfd_remove_devices(&intf->dev); usb_set_intfdata(ucr->pusb_intf, NULL); - usb_free_coherent(ucr->pusb_dev, IOBUF_SIZE, ucr->iobuf, - ucr->iobuf_dma); + kfree(ucr->iobuf); + ucr->iobuf = NULL; + ucr->cmd_buf = ucr->rsp_buf = NULL; } #ifdef CONFIG_PM --- a/include/linux/rtsx_usb.h +++ b/include/linux/rtsx_usb.h @@ -55,7 +55,6 @@ struct rtsx_ucr { struct usb_interface *pusb_intf; struct usb_sg_request current_sg; unsigned char *iobuf; - dma_addr_t iobuf_dma; struct timer_list sg_timer; struct mutex dev_mutex;
