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net: ipa: only reset channel twice for IPA v3.5.1

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In gsi_channel_reset(), RX channels are subjected to two consecutive
CHANNEL_RESET commands.  This workaround should only be used for IPA
version 3.5.1, and for newer hardware "can lead to unwanted behavior."

Only issue the second CHANNEL_RESET command for legacy hardware.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alex Elder 2020-05-04 18:30:03 -05:00 committed by David S. Miller
parent f86a1909ea
commit a3f2405b04
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ipa/gsi.c
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@ -840,9 +840,9 @@ void gsi_channel_reset(struct gsi *gsi, u32 channel_id, bool legacy)
mutex_lock(&gsi->mutex);
/* Due to a hardware quirk we need to reset RX channels twice. */
gsi_channel_reset_command(channel);
if (!channel->toward_ipa)
/* Due to a hardware quirk we may need to reset RX channels twice. */
if (legacy && !channel->toward_ipa)
gsi_channel_reset_command(channel);
gsi_channel_program(channel, legacy);