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ehci: cosmetic: Define the number of qt_buffers

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Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Ilya Yanok <ilya.yanok@cogentembedded.com>
Cc: Stefan Herbrechtsmeier <stefan@herbrechtsmeier.net>
This commit is contained in:
Benoît Thébaudeau 2012-07-19 22:16:38 +02:00 committed by Marek Vasut
parent 27e301e5b7
commit cdeb916120
2 changed files with 8 additions and 7 deletions
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4
drivers/usb/host/ehci-hcd.c
View file

@ -183,7 +183,7 @@ static int ehci_td_buffer(struct qTD *td, void *buf, size_t sz)
flush_dcache_range(addr, ALIGN(addr + sz, ARCH_DMA_MINALIGN));
idx = 0;
while (idx < 5) {
while (idx < QT_BUFFER_CNT) {
td->qt_buffer[idx] = cpu_to_hc32(addr);
td->qt_buffer_hi[idx] = 0;
next = (addr + 4096) & ~4095;
@ -195,7 +195,7 @@ static int ehci_td_buffer(struct qTD *td, void *buf, size_t sz)
idx++;
}
if (idx == 5) {
if (idx == QT_BUFFER_CNT) {
printf("out of buffer pointers (%u bytes left)\n", sz);
return -1;
}

11
drivers/usb/host/ehci.h
View file

@ -171,12 +171,13 @@ struct usb_linux_config_descriptor {
/* Queue Element Transfer Descriptor (qTD). */
struct qTD {
/* this part defined by EHCI spec */
uint32_t qt_next; /* see EHCI 3.5.1 */
uint32_t qt_next; /* see EHCI 3.5.1 */
#define QT_NEXT_TERMINATE 1
uint32_t qt_altnext; /* see EHCI 3.5.2 */
uint32_t qt_token; /* see EHCI 3.5.3 */
uint32_t qt_buffer[5]; /* see EHCI 3.5.4 */
uint32_t qt_buffer_hi[5]; /* Appendix B */
uint32_t qt_altnext; /* see EHCI 3.5.2 */
uint32_t qt_token; /* see EHCI 3.5.3 */
#define QT_BUFFER_CNT 5
uint32_t qt_buffer[QT_BUFFER_CNT]; /* see EHCI 3.5.4 */
uint32_t qt_buffer_hi[QT_BUFFER_CNT]; /* Appendix B */
/* pad struct for 32 byte alignment */
uint32_t unused[3];
};