Commit 34c6034b authored by Alex Elder's avatar Alex Elder Committed by David S. Miller
Browse files

net: ipa: add clock reference for remoteproc SSR 



The remoteproc SSR callback function for the modem requires hardware
access when handling a modem crash or shutdown.  Take and later
release an IPA clock reference in ipa_modem_crashed(), to ensure the
hardware is operational.

Signed-off-by: default avatarAlex Elder <elder@linaro.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent cf8dfe6a

drivers/net/ipa/ipa_modem.c

+5 −0
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ 
#include "ipa_smp2p.h"

#include "ipa_qmi.h"

#include "ipa_uc.h"

#include "ipa_clock.h"



#define IPA_NETDEV_NAME		"rmnet_ipa%d"

#define IPA_NETDEV_TAILROOM	0	/* for padding by mux layer */
@@ -279,6 +280,8 @@ static void ipa_modem_crashed(struct ipa *ipa) 
	struct device *dev = &ipa->pdev->dev;

	int ret;



	ipa_clock_get(ipa);



	ipa_endpoint_modem_pause_all(ipa, true);



	ipa_endpoint_modem_hol_block_clear_all(ipa);
@@ -303,6 +306,8 @@ static void ipa_modem_crashed(struct ipa *ipa) 
	ret = ipa_mem_zero_modem(ipa);

	if (ret)

		dev_err(dev, "error %d zeroing modem memory regions\n", ret);



	ipa_clock_put(ipa);

}



static int ipa_modem_notify(struct notifier_block *nb, unsigned long action,