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authorShuah Khan <skhan@linuxfoundation.org>2022-07-01 05:32:55 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-07-01 09:53:23 +0300
commiteb7f8e28420372787933eec079735c35034bda7d (patch)
tree2f3c999f466d185b016634759359bea2d165336f /drivers/misc/cardreader
parent19e506b317497a8c2b3ec2f12314d355d2f00ad0 (diff)
downloadlinux-eb7f8e28420372787933eec079735c35034bda7d.tar.xz
misc: rtsx_usb: fix use of dma mapped buffer for usb bulk transfer
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@linuxfoundation.org> Cc: stable <stable@kernel.org> Link: https://lore.kernel.org/r/667d627d502e1ba9ff4f9b94966df3299d2d3c0d.1656642167.git.skhan@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/cardreader')
-rw-r--r--drivers/misc/cardreader/rtsx_usb.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/misc/cardreader/rtsx_usb.c b/drivers/misc/cardreader/rtsx_usb.c
index 1ef9b61077c4..e147cc8ab0fd 100644
--- 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_interface *intf,
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_interface *intf,
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 usb_interface *intf)
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