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Code Issues Releases Wiki Activity

net: ipa: add clock reference for remoteproc SSR

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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: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alex Elder 2021-07-27 16:19:31 -05:00 committed by David S. Miller
parent cf8dfe6ab8
commit 34c6034b47
1 changed files with 5 additions and 0 deletions
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5
drivers/net/ipa/ipa_modem.c
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@ -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,