A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-09 13:49:24 -04:00
Code Issues Projects Releases Packages Wiki Activity

mhi: core: ensure non-zero session or sequence ID values

Browse source 
While writing any sequence or session identifiers, it is
possible that the host could write a zero value, whereas only
non-zero values are supported writes to those registers. Ensure
that host does not write a non-zero value for those cases.

Change-Id: I33248a0aa43321c85a107e394f953774140dec50
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
This commit is contained in:
Bhaumik Bhatt 2020-02-20 11:42:55 -08:00 • committed by Hemant Kumar
commit f1ae7429fb
1 changed files with 7 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

8
drivers/bus/mhi/core/mhi_boot.c
View file

@ -1,5 +1,5 @@
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2018-2019, The Linux Foundation. All rights reserved. */
/* Copyright (c) 2018-2020, The Linux Foundation. All rights reserved. */
#include <linux/debugfs.h>
#include <linux/delay.h>
@ -321,6 +321,9 @@ static int mhi_fw_load_amss(struct mhi_controller *mhi_cntrl,
mhi_buf->len);
mhi_cntrl->sequence_id = prandom_u32() & BHIE_TXVECSTATUS_SEQNUM_BMSK;
if (unlikely(!mhi_cntrl->sequence_id))
mhi_cntrl->sequence_id = 1;
mhi_write_reg_field(mhi_cntrl, base, BHIE_TXVECDB_OFFS,
BHIE_TXVECDB_SEQNUM_BMSK, BHIE_TXVECDB_SEQNUM_SHFT,
mhi_cntrl->sequence_id);
@ -383,6 +386,9 @@ static int mhi_fw_load_sbl(struct mhi_controller *mhi_cntrl,
lower_32_bits(dma_addr));
mhi_cntrl->write_reg(mhi_cntrl, base, BHI_IMGSIZE, size);
mhi_cntrl->session_id = prandom_u32() & BHI_TXDB_SEQNUM_BMSK;
if (unlikely(!mhi_cntrl->session_id))
mhi_cntrl->session_id = 1;
mhi_cntrl->write_reg(mhi_cntrl, base, BHI_IMGTXDB,
mhi_cntrl->session_id);
read_unlock_bh(pm_lock);