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drivers/usbdev: support read ZLP packet 

Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
This commit is contained in:
dongjiuzhu1 2024-02-25 18:45:21 +08:00 committed by Xiang Xiao
parent 4bcad6115b
commit 443306793c
1 changed files with 14 additions and 8 deletions
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22
drivers/usbdev/usbdev_fs.c
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@ -558,8 +558,6 @@ static ssize_t usbdev_fs_read(FAR struct file *filep, FAR char *buffer,
irqstate_t flags;
int ret;
assert(len > 0 && buffer != NULL);
ret = nxmutex_lock(&fs_ep->lock);
if (ret < 0)
{
@ -600,7 +598,7 @@ static ssize_t usbdev_fs_read(FAR struct file *filep, FAR char *buffer,
/* Device ready for read */
while (!sq_empty(&fs_ep->reqq) && len > 0)
while (!sq_empty(&fs_ep->reqq))
{
FAR struct usbdev_fs_req_s *container;
uint16_t reqlen;
@ -616,16 +614,24 @@ static ssize_t usbdev_fs_read(FAR struct file *filep, FAR char *buffer,
{
/* Output buffer full */
memcpy(&buffer[retlen],
&container->req->buf[container->offset],
len);
if (buffer != NULL)
{
memcpy(&buffer[retlen],
&container->req->buf[container->offset],
len);
}
container->offset += len;
retlen += len;
break;
}
memcpy(&buffer[retlen],
&container->req->buf[container->offset], reqlen);
if (buffer != NULL)
{
memcpy(&buffer[retlen],
&container->req->buf[container->offset], reqlen);
}
retlen += reqlen;
len -= reqlen;