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usb: pd: Clear send_get_status flag in protocol reset

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Consider a scenario where a connected PD partner has sent an
alert message to the device and driver marked send_get_status
to true and queued usbpd_sm work with a delay of 150ms. Now,
if the cable gets disconnected before the start of usbpd_sm
work then send_get_status flag will not get cleared anywhere.
On the next cable plug-in, in PE_SNK_READY driver will
unnecessarily send Get_Status again which is incorrect and
may lead to soft/hard reset causing the PD partner to disconnect.
Fix this by clearing the send_get_status flag in the protocol reset.

Change-Id: I4747b0a25a0870e83ff78e0b9ccd7e3fd91ed9e6
Signed-off-by: Pratham Pratap <prathampratap@codeaurora.org>
This commit is contained in:
Pratham Pratap 2020-08-06 12:28:15 +05:30 • committed by Gerrit - the friendly Code Review server
commit c2ee1fcf36
1 changed files with 1 additions and 0 deletions
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1
drivers/usb/pd/policy_engine.c
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@ -743,6 +743,7 @@ static inline void pd_reset_protocol(struct usbpd *pd)
memset(pd->rx_msgid, -1, sizeof(pd->rx_msgid));
memset(pd->tx_msgid, 0, sizeof(pd->tx_msgid));
pd->send_request = false;
pd->send_get_status = false;
pd->send_pr_swap = false;
pd->send_dr_swap = false;
}