diff options
| author | Gary King <gking@nvidia.com> | 2010-02-12 18:35:19 -0800 |
|---|---|---|
| committer | Gary King <gking@nvidia.com> | 2010-05-17 10:31:04 -0700 |
| commit | db0941d0ce12af751c522410b0604878e8bf3114 (patch) | |
| tree | 765fb6ebf86cbef193af205a4bcd0cc730ec5f2e /include | |
| parent | 228390f13ef2b9c6df1933b158a2458a6ec37a92 (diff) | |
f_mass_storage: allow platform to set bulk buffer size
add a field to the usb_mass_storage_platform_data structure to allow platforms
to specify the size of the bulk transfer buffer; if unspecified, default
to the BULK_BUFFER_SIZE defined by f_mass_storage.c (previously defined as
4KiB).
on tegra 2, performance of a class 10 SD card mounted as USB mass storage
through this gadget has been measured to increase from ~7MB/sec read to
~17MB/sec read by increasing the buffer size from 4KiB to 16KiB.
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/usb/android_composite.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/usb/android_composite.h b/include/linux/usb/android_composite.h index 50889ba138b9..b7b4b5599d3f 100644 --- a/include/linux/usb/android_composite.h +++ b/include/linux/usb/android_composite.h @@ -79,6 +79,7 @@ struct usb_mass_storage_platform_data { /* number of LUNS */ int nluns; + size_t bulk_size; }; /* Platform data for USB ethernet driver. */ |