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[PATCH] usb-serial: Fix data corruption with usb serial emulation 

* Remove the unused send_buf variable and its constant.

* Fix a math error
  The variables recv_ptr and recv_used are not large enough to hold
  the constant 384, which causes data corruption when the pointer is
  reset with: s->recv_ptr = (s->recv_ptr + len) % RECV_BUF;

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Acked-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5242 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aurel32 2008-09-17 22:04:21 +00:00
parent 49237acdb7
commit 8109b9b6bf
1 changed files with 2 additions and 4 deletions
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6
hw/usb-serial.c
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@ -22,7 +22,6 @@ do { printf("usb-serial: " fmt , ##args); } while (0)
#endif
#define RECV_BUF 384
#define SEND_BUF 128 // Not used for now
/* Commands */
#define FTDI_RESET 0
@ -94,9 +93,8 @@ typedef struct {
uint16_t vendorid;
uint16_t productid;
uint8_t recv_buf[RECV_BUF];
uint8_t recv_ptr;
uint8_t recv_used;
uint8_t send_buf[SEND_BUF];
uint16_t recv_ptr;
uint16_t recv_used;
uint8_t event_chr;
uint8_t error_chr;
uint8_t event_trigger;