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Pawel Laszczak 180113fe98 usb: gadget: Fix issue with config_ep_by_speed function 
[ Upstream commit 5d363120aa548ba52d58907a295eee25f8207ed2 ]

This patch adds new config_ep_by_speed_and_alt function which
extends the config_ep_by_speed about alt parameter.
This additional parameter allows to find proper usb_ss_ep_comp_descriptor.

Problem has appeared during testing f_tcm (BOT/UAS) driver function.

f_tcm function for SS use array of headers for both  BOT/UAS alternate
setting:

static struct usb_descriptor_header *uasp_ss_function_desc[] = {
        (struct usb_descriptor_header *) &bot_intf_desc,
        (struct usb_descriptor_header *) &uasp_ss_bi_desc,
        (struct usb_descriptor_header *) &bot_bi_ep_comp_desc,
        (struct usb_descriptor_header *) &uasp_ss_bo_desc,
        (struct usb_descriptor_header *) &bot_bo_ep_comp_desc,

        (struct usb_descriptor_header *) &uasp_intf_desc,
        (struct usb_descriptor_header *) &uasp_ss_bi_desc,
        (struct usb_descriptor_header *) &uasp_bi_ep_comp_desc,
        (struct usb_descriptor_header *) &uasp_bi_pipe_desc,
        (struct usb_descriptor_header *) &uasp_ss_bo_desc,
        (struct usb_descriptor_header *) &uasp_bo_ep_comp_desc,
        (struct usb_descriptor_header *) &uasp_bo_pipe_desc,
        (struct usb_descriptor_header *) &uasp_ss_status_desc,
        (struct usb_descriptor_header *) &uasp_status_in_ep_comp_desc,
        (struct usb_descriptor_header *) &uasp_status_pipe_desc,
        (struct usb_descriptor_header *) &uasp_ss_cmd_desc,
        (struct usb_descriptor_header *) &uasp_cmd_comp_desc,
        (struct usb_descriptor_header *) &uasp_cmd_pipe_desc,
        NULL,
};

The first 5 descriptors are associated with BOT alternate setting,
and others are associated with UAS.

During handling UAS alternate setting f_tcm driver invokes
config_ep_by_speed and this function sets incorrect companion endpoint
descriptor in usb_ep object.

Instead setting ep->comp_desc to uasp_bi_ep_comp_desc function in this
case set ep->comp_desc to uasp_ss_bi_desc.

This is due to the fact that it searches endpoint based on endpoint
address:

        for_each_ep_desc(speed_desc, d_spd) {
                chosen_desc = (struct usb_endpoint_descriptor *)*d_spd;
                if (chosen_desc->bEndpoitAddress == _ep->address)
                        goto ep_found;
        }

And in result it uses the descriptor from BOT alternate setting
instead UAS.

Finally, it causes that controller driver during enabling endpoints
detect that just enabled endpoint for bot.

Signed-off-by: Jayshri Pawar <jpawar@cadence.com>
Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2021-03-16 16:30:23 +08:00
Documentation dt-bindings: display: mediatek: control dpi pins mode to avoid leakage 2021-03-16 16:29:24 +08:00
LICENSES Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
arch powerpc/64s/pgtable: fix an undefined behaviour 2021-03-16 16:30:21 +08:00
block iocost: don't let vrate run wild while there's no saturation signal 2021-03-16 16:29:32 +08:00
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crypto crypto: drbg - fix error return code in drbg_alloc_state() 2021-03-16 16:29:06 +08:00
drivers usb: gadget: Fix issue with config_ep_by_speed function 2021-03-16 16:30:23 +08:00
fs fuse: copy_file_range should truncate cache 2021-03-16 16:30:20 +08:00
include usb: gadget: Fix issue with config_ep_by_speed function 2021-03-16 16:30:23 +08:00
init x86: Fix early boot crash on gcc-10, third try 2021-03-16 16:28:02 +08:00
ipc ipc/util.c: sysvipc_find_ipc() incorrectly updates position index 2021-03-16 16:27:51 +08:00
kernel kernel/cpu_pm: Fix uninitted local in cpu_pm 2021-03-16 16:29:48 +08:00
lib kasan: stop tests being eliminated as dead code with FORTIFY_SOURCE 2021-03-16 16:29:38 +08:00
mm mm: call cond_resched() from deferred_init_memmap() 2021-03-16 16:29:40 +08:00
net bpf, sockhash: Fix memory leak when unlinking sockets in sock_hash_free 2021-03-16 16:30:07 +08:00
package config/arm64: OPEN CONFIG_PSI and phytium configs 2021-03-16 11:02:59 +08:00
samples samples: bpf: Fix build error 2021-03-16 16:28:31 +08:00
scripts mksysmap: Fix the mismatch of '.L' symbols in System.map 2021-03-16 16:30:06 +08:00
security apparmor: fix nnp subset test for unconfined 2021-03-16 16:30:07 +08:00
sound ASoC: Intel: bytcr_rt5640: Add quirk for Toshiba Encore WT8-A tablet 2021-03-16 16:30:19 +08:00
tools perf symbols: Fix kernel maps for kcore and eBPF 2021-03-16 16:29:54 +08:00
usr Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
virt KVM: arm64: Save the host's PtrAuth keys in non-preemptible context 2021-03-16 16:29:14 +08:00
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README.md

Tencent Linux Kernel 4.0