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author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-14 17:37:52 +0200 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-16 11:02:50 +0200 |
commit | aea67cc1418252d07b9b56688f1b5fa70fcae813 (patch) | |
tree | 9c051d8cefb775eea08fd243987800cf3d7b7703 | |
parent | ec8eeceb06b7a6efb6d924fd2f4ba4ec79ddc7bf (diff) | |
download | linux-stable-aea67cc1418252d07b9b56688f1b5fa70fcae813.tar.gz linux-stable-aea67cc1418252d07b9b56688f1b5fa70fcae813.tar.bz2 linux-stable-aea67cc1418252d07b9b56688f1b5fa70fcae813.zip |
sound: 6fire: move to use usb_control_msg_send() and usb_control_msg_recv()
The usb_control_msg_send() and usb_control_msg_recv() calls can return
an error if a "short" write/read happens, so move the driver over to
using those calls instead, saving some logic in the wrapper functions
that were being used in this driver.
This also resolves a long-staging bug where data on the stack was being
sent in a USB control message, which was not allowed.
Cc: Jaroslav Kysela <perex@perex.cz>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20200914153756.3412156-8-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | sound/usb/6fire/firmware.c | 38 |
1 files changed, 13 insertions, 25 deletions
diff --git a/sound/usb/6fire/firmware.c b/sound/usb/6fire/firmware.c index 69137c14d0dc..5b8994070c96 100644 --- a/sound/usb/6fire/firmware.c +++ b/sound/usb/6fire/firmware.c @@ -158,29 +158,17 @@ static int usb6fire_fw_ihex_init(const struct firmware *fw, static int usb6fire_fw_ezusb_write(struct usb_device *device, int type, int value, char *data, int len) { - int ret; - - ret = usb_control_msg(device, usb_sndctrlpipe(device, 0), type, - USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, - value, 0, data, len, HZ); - if (ret < 0) - return ret; - else if (ret != len) - return -EIO; - return 0; + return usb_control_msg_send(device, 0, type, + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + value, 0, data, len, HZ); } static int usb6fire_fw_ezusb_read(struct usb_device *device, int type, int value, char *data, int len) { - int ret = usb_control_msg(device, usb_rcvctrlpipe(device, 0), type, - USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, value, - 0, data, len, HZ); - if (ret < 0) - return ret; - else if (ret != len) - return -EIO; - return 0; + return usb_control_msg_recv(device, 0, type, + USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + value, 0, data, len, HZ); } static int usb6fire_fw_fpga_write(struct usb_device *device, @@ -230,7 +218,7 @@ static int usb6fire_fw_ezusb_upload( /* upload firmware image */ data = 0x01; /* stop ezusb cpu */ ret = usb6fire_fw_ezusb_write(device, 0xa0, 0xe600, &data, 1); - if (ret < 0) { + if (ret) { kfree(rec); release_firmware(fw); dev_err(&intf->dev, @@ -242,7 +230,7 @@ static int usb6fire_fw_ezusb_upload( while (usb6fire_fw_ihex_next_record(rec)) { /* write firmware */ ret = usb6fire_fw_ezusb_write(device, 0xa0, rec->address, rec->data, rec->len); - if (ret < 0) { + if (ret) { kfree(rec); release_firmware(fw); dev_err(&intf->dev, @@ -257,7 +245,7 @@ static int usb6fire_fw_ezusb_upload( if (postdata) { /* write data after firmware has been uploaded */ ret = usb6fire_fw_ezusb_write(device, 0xa0, postaddr, postdata, postlen); - if (ret < 0) { + if (ret) { dev_err(&intf->dev, "unable to upload ezusb firmware %s: post urb.\n", fwname); @@ -267,7 +255,7 @@ static int usb6fire_fw_ezusb_upload( data = 0x00; /* resume ezusb cpu */ ret = usb6fire_fw_ezusb_write(device, 0xa0, 0xe600, &data, 1); - if (ret < 0) { + if (ret) { dev_err(&intf->dev, "unable to upload ezusb firmware %s: end message.\n", fwname); @@ -302,7 +290,7 @@ static int usb6fire_fw_fpga_upload( end = fw->data + fw->size; ret = usb6fire_fw_ezusb_write(device, 8, 0, NULL, 0); - if (ret < 0) { + if (ret) { kfree(buffer); release_firmware(fw); dev_err(&intf->dev, @@ -327,7 +315,7 @@ static int usb6fire_fw_fpga_upload( kfree(buffer); ret = usb6fire_fw_ezusb_write(device, 9, 0, NULL, 0); - if (ret < 0) { + if (ret) { dev_err(&intf->dev, "unable to upload fpga firmware: end urb.\n"); return ret; @@ -363,7 +351,7 @@ int usb6fire_fw_init(struct usb_interface *intf) u8 buffer[12]; ret = usb6fire_fw_ezusb_read(device, 1, 0, buffer, 8); - if (ret < 0) { + if (ret) { dev_err(&intf->dev, "unable to receive device firmware state.\n"); return ret; |