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adbd: reduce the USB buffer sizes to 16k. 

Some USB controllers only support 16k writes, so drop down to that.

Bug: http://b/130622010
Test: treehugger
Change-Id: I836d5b2d0d6fcae05f290af11a6a19c6e8d7c1ba
This commit is contained in:
Josh Gao 2019-04-16 11:20:04 -07:00
parent a853a2f8ec
commit 770a6a4d46
1 changed files with 3 additions and 2 deletions
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5
adb/daemon/usb.cpp
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@ -57,11 +57,12 @@ using android::base::StringPrintf;
// We can't find out whether we have support for AIO on ffs endpoints until we submit a read. // We can't find out whether we have support for AIO on ffs endpoints until we submit a read.
static std::optional<bool> gFfsAioSupported; static std::optional<bool> gFfsAioSupported;
// Not all USB controllers support operations larger than 16k, so don't go above that.
static constexpr size_t kUsbReadQueueDepth = 32; static constexpr size_t kUsbReadQueueDepth = 32;
static constexpr size_t kUsbReadSize = 8 * PAGE_SIZE; static constexpr size_t kUsbReadSize = 4 * PAGE_SIZE;
static constexpr size_t kUsbWriteQueueDepth = 32; static constexpr size_t kUsbWriteQueueDepth = 32;
static constexpr size_t kUsbWriteSize = 8 * PAGE_SIZE; static constexpr size_t kUsbWriteSize = 4 * PAGE_SIZE;
static const char* to_string(enum usb_functionfs_event_type type) { static const char* to_string(enum usb_functionfs_event_type type) {
switch (type) { switch (type) {