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usb_storage: blacklist Enclosure Service Devices

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Skip enclosure service devices when probing for usb storage devices.

This avoids long timeouts when probing for external usb harddisks
which provide "Enclosure Services".

Signed-off-by: Soeren Moch <smoch@web.de>
--

This is a new version of the patch
"usb_storage: skip all unknown devices when probing"
http://http://lists.denx.de/pipermail/u-boot/2014-November/194622.html

Cc: Marek Vasut <marex@denx.de>
Cc: Tom Rini <trini@ti.com>
This commit is contained in:
Soeren Moch 2014-11-08 07:02:14 +01:00 committed by Marek Vasut
parent 3908f16f85
commit 6a559bbe2f
1 changed files with 5 additions and 2 deletions
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7
common/usb_storage.c
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@ -1351,8 +1351,11 @@ int usb_stor_get_info(struct usb_device *dev, struct us_data *ss,
perq = usb_stor_buf[0];
modi = usb_stor_buf[1];
if ((perq & 0x1f) == 0x1f) {
/* skip unknown devices */
/*
* Skip unknown devices (0x1f) and enclosure service devices (0x0d),
* they would not respond to test_unit_ready .
*/
if (((perq & 0x1f) == 0x1f) || ((perq & 0x1f) == 0x0d)) {
return 0;
}
if ((modi&0x80) == 0x80) {