4.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Alexey Sokolov <sokolov@xxxxxxxxxx>
commit 15bf722e6f6c0b884521a0363204532e849deb7f upstream.
ATOL FPrint fiscal printers require usb_clear_halt to be executed
to work properly. Add quirk to fix the issue.
Signed-off-by: Alexey Sokolov <sokolov@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/class/cdc-acm.c | 9 +++++++++
drivers/usb/class/cdc-acm.h | 1 +
2 files changed, 10 insertions(+)
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1477,6 +1477,11 @@ skip_countries:
goto alloc_fail8;
}
+ if (quirks & CLEAR_HALT_CONDITIONS) {
+ usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress));
+ usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress));
+ }
+
return 0;
alloc_fail8:
if (acm->country_codes) {
@@ -1756,6 +1761,10 @@ static const struct usb_device_id acm_id
.driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
},
+ { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
+ .driver_info = CLEAR_HALT_CONDITIONS,
+ },
+
/* Nokia S60 phones expose two ACM channels. The first is
* a modem and is picked up by the standard AT-command
* information below. The second is 'vendor-specific' but
--- a/drivers/usb/class/cdc-acm.h
+++ b/drivers/usb/class/cdc-acm.h
@@ -133,3 +133,4 @@ struct acm {
#define NO_DATA_INTERFACE BIT(4)
#define IGNORE_DEVICE BIT(5)
#define QUIRK_CONTROL_LINE_STATE BIT(6)
+#define CLEAR_HALT_CONDITIONS BIT(7)
--
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