Messages in this thread Patch in this message | | | From | Alex Elder <> | Subject | [PATCH net-next 3/5] net: ipa: add clock reference for remoteproc SSR | Date | Tue, 27 Jul 2021 16:19:31 -0500 |
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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> --- drivers/net/ipa/ipa_modem.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/net/ipa/ipa_modem.c b/drivers/net/ipa/ipa_modem.c index c851e2cf12552..a744b81db0d9f 100644 --- a/drivers/net/ipa/ipa_modem.c +++ b/drivers/net/ipa/ipa_modem.c @@ -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, -- 2.27.0
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