diff options
| author |   Bhaumik Bhatt <bbhatt@codeaurora.org> | 2021-04-01 14:16:15 -0700 |
|---|---|---|
| committer |   Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> | 2021-04-07 12:25:42 +0530 |
| commit | 47705c08465931923e2f2b506986ca0bdf80380d (patch) | |
| tree | 101c75b3df743191dabc447e60686660c8701fd8 /drivers/bus | |
| parent | bus: mhi: core: Hold device wake for channel update commands (diff) | |
| download | linux-dev-47705c08465931923e2f2b506986ca0bdf80380d.tar.xz linux-dev-47705c08465931923e2f2b506986ca0bdf80380d.zip | |
bus: mhi: core: Clear configuration from channel context during reset
When clearing up the channel context after client drivers are
done using channels, the configuration is currently not being
reset entirely. Ensure this is done to appropriately handle
issues where clients unaware of the context state end up calling
functions which expect a context.
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/1617311778-1254-7-git-send-email-bbhatt@codeaurora.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Diffstat (limited to 'drivers/bus')
| -rw-r--r-- | drivers/bus/mhi/core/init.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c index 0e54384e9fc5..c81b377fca8f 100644 --- a/drivers/bus/mhi/core/init.c +++ b/drivers/bus/mhi/core/init.c @@ -558,6 +558,7 @@ void mhi_deinit_chan_ctxt(struct mhi_controller *mhi_cntrl, struct mhi_ring *buf_ring; struct mhi_ring *tre_ring; struct mhi_chan_ctxt *chan_ctxt; + u32 tmp; buf_ring = &mhi_chan->buf_ring; tre_ring = &mhi_chan->tre_ring; @@ -571,7 +572,19 @@ void mhi_deinit_chan_ctxt(struct mhi_controller *mhi_cntrl, vfree(buf_ring->base); buf_ring->base = tre_ring->base = NULL; + tre_ring->ctxt_wp = NULL; chan_ctxt->rbase = 0; + chan_ctxt->rlen = 0; + chan_ctxt->rp = 0; + chan_ctxt->wp = 0; + + tmp = chan_ctxt->chcfg; + tmp &= ~CHAN_CTX_CHSTATE_MASK; + tmp |= (MHI_CH_STATE_DISABLED << CHAN_CTX_CHSTATE_SHIFT); + chan_ctxt->chcfg = tmp; + + /* Update to all cores */ + smp_wmb(); } int mhi_init_chan_ctxt(struct mhi_controller *mhi_cntrl, |