Commit 47705c08 authored by Bhaumik Bhatt's avatar Bhaumik Bhatt Committed by Manivannan Sadhasivam
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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: default avatarBhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: default avatarHemant Kumar <hemantk@codeaurora.org>
Reviewed-by: default avatarManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/1617311778-1254-7-git-send-email-bbhatt@codeaurora.org


Signed-off-by: default avatarManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
parent 73b7aebc

drivers/bus/mhi/core/init.c

+13 −0
Original line number Diff line number Diff line
@@ -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,