diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0374-dwc_otg-checking-the-urb-transfer_buffer-too-early-3.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0374-dwc_otg-checking-the-urb-transfer_buffer-too-early-3.patch | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0374-dwc_otg-checking-the-urb-transfer_buffer-too-early-3.patch b/target/linux/bcm27xx/patches-5.4/950-0374-dwc_otg-checking-the-urb-transfer_buffer-too-early-3.patch new file mode 100644 index 0000000000..ee12a0f5db --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0374-dwc_otg-checking-the-urb-transfer_buffer-too-early-3.patch @@ -0,0 +1,59 @@ +From 271a9dfee2eb426ca9ec1ef51c6205de8496b803 Mon Sep 17 00:00:00 2001 +From: Hui Wang <hui.wang@canonical.com> +Date: Sun, 17 Nov 2019 10:31:46 +0800 +Subject: [PATCH] dwc_otg: checking the urb->transfer_buffer too early + (#3332) + +After enable the HIGHMEM and VMSPLIT_3G, the dwc_otg driver doesn't +work well on Pi2/3 boards with 1G physical ram. Users experience +the failure when copying a file of 600M size to the USB stick. And +at the same time, the dmesg shows: +usb 1-1.1.2: reset high-speed USB device number 8 using dwc_otg +sd 0:0:0:0: [sda] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK +blk_update_request: I/O error, dev sda, sector 3024048 op 0x1:(WRITE) flags 0x4000 phys_seg 15 prio class 0 + +When this happens, the sg_buf sent to the driver is located in the +highmem region, the usb_sg_init() in the core/message.c will leave +transfer_buffer to NULL if the sg_buf is in highmem, but in the +dwc_otg driver, it returns -EINVAL unconditionally if transfer_buffer +is NULL. + +The driver can handle the situation of buffer to be NULL, if it is in +DMA mode, it will convert an address from transfer_dma. + +But if the conversion fails or it is in the PIO mode, we should check +buffer and return -EINVAL if it is NULL. + +BugLink: https://bugs.launchpad.net/bugs/1852510 +Signed-off-by: Hui Wang <hui.wang@canonical.com> +--- + drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c | 11 +++++++---- + 1 file changed, 7 insertions(+), 4 deletions(-) + +--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c ++++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c +@@ -821,10 +821,6 @@ static int dwc_otg_urb_enqueue(struct us + dump_urb_info(urb, "dwc_otg_urb_enqueue"); + } + #endif +- +- if (!urb->transfer_buffer && urb->transfer_buffer_length) +- return -EINVAL; +- + if ((usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) + || (usb_pipetype(urb->pipe) == PIPE_INTERRUPT)) { + if (!dwc_otg_hcd_is_bandwidth_allocated +@@ -881,6 +877,13 @@ static int dwc_otg_urb_enqueue(struct us + &urb->transfer_dma, buf); + } + ++ if (!buf && urb->transfer_buffer_length) { ++ DWC_FREE(dwc_otg_urb); ++ DWC_ERROR("transfer_buffer is NULL in PIO mode or both " ++ "transfer_buffer and transfer_dma are NULL in DMA mode\n"); ++ return -EINVAL; ++ } ++ + if (!(urb->transfer_flags & URB_NO_INTERRUPT)) + flags |= URB_GIVEBACK_ASAP; + if (urb->transfer_flags & URB_ZERO_PACKET) |