diff options
| author | Oliver Neukum <neukum@fachschaft.cup.uni-muenchen.de> | 2006-05-14 00:50:47 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-06-22 02:04:08 +0400 |
| commit | 86478944eba887f149e151bacc023ae4b2d23ea6 (patch) | |
| tree | 21c9871c1524c75cc702e0fbaa7700e82a9f744f /drivers/usb/class/cdc-acm.h | |
| parent | 5cd330f4f30eb154e7af9210bed42dfcd447997f (diff) | |
| download | linux-86478944eba887f149e151bacc023ae4b2d23ea6.tar.xz | |
[PATCH] USB: cdc-acm: add a new special case for modems with buggy firmware
this fixes the "duplicated text" bug. There's a modem that cannot cope
with large transfers and more than one urb in flight. This patch adds a
special case to the driver.
Signed-off-by: Oliver Neukum <oliver@neukum.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/class/cdc-acm.h')
| -rw-r--r-- | drivers/usb/class/cdc-acm.h | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/drivers/usb/class/cdc-acm.h b/drivers/usb/class/cdc-acm.h index fd2aaccdcbac..1bcaea32cfc1 100644 --- a/drivers/usb/class/cdc-acm.h +++ b/drivers/usb/class/cdc-acm.h @@ -56,11 +56,11 @@ * in line disciplines. They ask for empty space amount, receive our URB size, * and proceed to issue several 1-character writes, assuming they will fit. * The very first write takes a complete URB. Fortunately, this only happens - * when processing onlcr, so we only need 2 buffers. + * when processing onlcr, so we only need 2 buffers. These values must be + * powers of 2. */ -#define ACM_NWB 2 -#define ACM_NRU 16 -#define ACM_NRB 16 +#define ACM_NW 2 +#define ACM_NR 16 struct acm_wb { unsigned char *buf; @@ -91,9 +91,10 @@ struct acm { struct urb *ctrlurb, *writeurb; /* urbs */ u8 *ctrl_buffer; /* buffers of urbs */ dma_addr_t ctrl_dma; /* dma handles of buffers */ - struct acm_wb wb[ACM_NWB]; - struct acm_ru ru[ACM_NRU]; - struct acm_rb rb[ACM_NRB]; + struct acm_wb wb[ACM_NW]; + struct acm_ru ru[ACM_NR]; + struct acm_rb rb[ACM_NR]; + int rx_buflimit; int rx_endpoint; spinlock_t read_lock; struct list_head spare_read_urbs; @@ -122,3 +123,4 @@ struct acm { /* constants describing various quirks and errors */ #define NO_UNION_NORMAL 1 +#define SINGLE_RX_URB 2 |