diff options
Diffstat (limited to 'meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/files/0001-NFC-pn533-don-t-send-USB-data-off-of-the-stack.patch')
| -rw-r--r-- | meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/files/0001-NFC-pn533-don-t-send-USB-data-off-of-the-stack.patch | 145 |
1 files changed, 0 insertions, 145 deletions
diff --git a/meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/files/0001-NFC-pn533-don-t-send-USB-data-off-of-the-stack.patch b/meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/files/0001-NFC-pn533-don-t-send-USB-data-off-of-the-stack.patch deleted file mode 100644 index b64cc16cf..000000000 --- a/meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/files/0001-NFC-pn533-don-t-send-USB-data-off-of-the-stack.patch +++ /dev/null @@ -1,145 +0,0 @@ -From dbafc28955fa6779dc23d1607a0fee5e509a278b Mon Sep 17 00:00:00 2001 -From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -Date: Sun, 20 May 2018 15:19:46 +0200 -Subject: [PATCH] NFC: pn533: don't send USB data off of the stack - -It's amazing that this driver ever worked, but now that x86 doesn't -allow USB data to be sent off of the stack, it really does not work at -all. Fix this up by properly allocating the data for the small -"commands" that get sent to the device off of the stack. - -We do this for one command by having a whole urb just for ack messages, -as they can be submitted in interrupt context, so we can not use -usb_bulk_msg(). But the poweron command can sleep (and does), so use -usb_bulk_msg() for that transfer. - -Reported-by: Carlos Manuel Santos <cmmpsantos@gmail.com> -Cc: Samuel Ortiz <sameo@linux.intel.com> -Cc: Stephen Hemminger <stephen@networkplumber.org> -Cc: stable <stable@vger.kernel.org> -Reviewed-by: Johan Hovold <johan@kernel.org> -Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> ---- - drivers/nfc/pn533/usb.c | 42 +++++++++++++++++++++++++++++------------ - 1 file changed, 30 insertions(+), 12 deletions(-) - -diff --git a/drivers/nfc/pn533/usb.c b/drivers/nfc/pn533/usb.c -index e153e8b64bb8..d5553c47014f 100644 ---- a/drivers/nfc/pn533/usb.c -+++ b/drivers/nfc/pn533/usb.c -@@ -62,6 +62,9 @@ struct pn533_usb_phy { - struct urb *out_urb; - struct urb *in_urb; - -+ struct urb *ack_urb; -+ u8 *ack_buffer; -+ - struct pn533 *priv; - }; - -@@ -150,13 +153,16 @@ static int pn533_usb_send_ack(struct pn533 *dev, gfp_t flags) - struct pn533_usb_phy *phy = dev->phy; - static const u8 ack[6] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00}; - /* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */ -- int rc; - -- phy->out_urb->transfer_buffer = (u8 *)ack; -- phy->out_urb->transfer_buffer_length = sizeof(ack); -- rc = usb_submit_urb(phy->out_urb, flags); -+ if (!phy->ack_buffer) { -+ phy->ack_buffer = kmemdup(ack, sizeof(ack), flags); -+ if (!phy->ack_buffer) -+ return -ENOMEM; -+ } - -- return rc; -+ phy->ack_urb->transfer_buffer = phy->ack_buffer; -+ phy->ack_urb->transfer_buffer_length = sizeof(ack); -+ return usb_submit_urb(phy->ack_urb, flags); - } - - static int pn533_usb_send_frame(struct pn533 *dev, -@@ -375,26 +381,31 @@ static int pn533_acr122_poweron_rdr(struct pn533_usb_phy *phy) - /* Power on th reader (CCID cmd) */ - u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON, - 0, 0, 0, 0, 0, 0, 3, 0, 0}; -+ char *buffer; -+ int transferred; - int rc; - void *cntx; - struct pn533_acr122_poweron_rdr_arg arg; - - dev_dbg(&phy->udev->dev, "%s\n", __func__); - -+ buffer = kmemdup(cmd, sizeof(cmd), GFP_KERNEL); -+ if (!buffer) -+ return -ENOMEM; -+ - init_completion(&arg.done); - cntx = phy->in_urb->context; /* backup context */ - - phy->in_urb->complete = pn533_acr122_poweron_rdr_resp; - phy->in_urb->context = &arg; - -- phy->out_urb->transfer_buffer = cmd; -- phy->out_urb->transfer_buffer_length = sizeof(cmd); -- - print_hex_dump_debug("ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1, - cmd, sizeof(cmd), false); - -- rc = usb_submit_urb(phy->out_urb, GFP_KERNEL); -- if (rc) { -+ rc = usb_bulk_msg(phy->udev, phy->out_urb->pipe, buffer, sizeof(cmd), -+ &transferred, 0); -+ kfree(buffer); -+ if (rc || (transferred != sizeof(cmd))) { - nfc_err(&phy->udev->dev, - "Reader power on cmd error %d\n", rc); - return rc; -@@ -490,8 +501,9 @@ static int pn533_usb_probe(struct usb_interface *interface, - - phy->in_urb = usb_alloc_urb(0, GFP_KERNEL); - phy->out_urb = usb_alloc_urb(0, GFP_KERNEL); -+ phy->ack_urb = usb_alloc_urb(0, GFP_KERNEL); - -- if (!phy->in_urb || !phy->out_urb) -+ if (!phy->in_urb || !phy->out_urb || !phy->ack_urb) - goto error; - - usb_fill_bulk_urb(phy->in_urb, phy->udev, -@@ -501,7 +513,9 @@ static int pn533_usb_probe(struct usb_interface *interface, - usb_fill_bulk_urb(phy->out_urb, phy->udev, - usb_sndbulkpipe(phy->udev, out_endpoint), - NULL, 0, pn533_send_complete, phy); -- -+ usb_fill_bulk_urb(phy->ack_urb, phy->udev, -+ usb_sndbulkpipe(phy->udev, out_endpoint), -+ NULL, 0, pn533_send_complete, phy); - - switch (id->driver_info) { - case PN533_DEVICE_STD: -@@ -554,6 +568,7 @@ static int pn533_usb_probe(struct usb_interface *interface, - error: - usb_free_urb(phy->in_urb); - usb_free_urb(phy->out_urb); -+ usb_free_urb(phy->ack_urb); - usb_put_dev(phy->udev); - kfree(in_buf); - -@@ -573,10 +588,13 @@ static void pn533_usb_disconnect(struct usb_interface *interface) - - usb_kill_urb(phy->in_urb); - usb_kill_urb(phy->out_urb); -+ usb_kill_urb(phy->ack_urb); - - kfree(phy->in_urb->transfer_buffer); - usb_free_urb(phy->in_urb); - usb_free_urb(phy->out_urb); -+ usb_free_urb(phy->ack_urb); -+ kfree(phy->ack_buffer); - - nfc_info(&interface->dev, "NXP PN533 NFC device disconnected\n"); - } --- -2.17.1 - |