net: ipa: set up IPA interrupts earlier

Initialization of the IPA driver has several phases:
   - "init" phase can be done without any access to IPA hardware
   - "config" phase requires the IPA hardware to be clocked
   - "setup" phase requires the GSI layer to be functional

Currently, initialization for the IPA interrupt handling code occurs
in the setup phase.  It requires access to the IPA hardware but does
not need GSI, so it can be moved to the config phase instead.

Call the interrupt configuration function early in ipa_config()
rather than from ipa_setup().  Rename ipa_interrupt_setup() to be
ipa_interrupt_config(), and ipa_interrupt_teardown() to be
ipa_interupt_deconfig(), so their names properly indicate when
they get called.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ipa/ipa_interrupt.c b/drivers/net/ipa/ipa_interrupt.c
index e792bc3be57666fb4dbd8c473cb1bc374403ddb2..9fd158dd904731c28e64c3ed4fc3d7089b0a3940 100644 (file)
--- a/drivers/net/ipa/ipa_interrupt.c
+++ b/drivers/net/ipa/ipa_interrupt.c
@@ -233,8 +233,8 @@ ipa_interrupt_remove(struct ipa_interrupt *interrupt, enum ipa_irq_id ipa_irq)
        interrupt->handler[ipa_irq] = NULL;
 }
 
-/* Set up the IPA interrupt framework */
-struct ipa_interrupt *ipa_interrupt_setup(struct ipa *ipa)
+/* Configure the IPA interrupt framework */
+struct ipa_interrupt *ipa_interrupt_config(struct ipa *ipa)
 {
        struct device *dev = &ipa->pdev->dev;
        struct ipa_interrupt *interrupt;
@@ -283,8 +283,8 @@ err_kfree:
        return ERR_PTR(ret);
 }
 
-/* Tear down the IPA interrupt framework */
-void ipa_interrupt_teardown(struct ipa_interrupt *interrupt)
+/* Inverse of ipa_interrupt_config() */
+void ipa_interrupt_deconfig(struct ipa_interrupt *interrupt)
 {
        struct device *dev = &interrupt->ipa->pdev->dev;
        int ret;

diff --git a/drivers/net/ipa/ipa_interrupt.h b/drivers/net/ipa/ipa_interrupt.h
index d5c486a6800d958f69b3095d31e620d03a228f4a..231390cea52a2f56e9c01880a30778ef18f33bfc 100644 (file)
--- a/drivers/net/ipa/ipa_interrupt.h
+++ b/drivers/net/ipa/ipa_interrupt.h
@@ -86,17 +86,17 @@ void ipa_interrupt_suspend_clear_all(struct ipa_interrupt *interrupt);
 void ipa_interrupt_simulate_suspend(struct ipa_interrupt *interrupt);
 
 /**
- * ipa_interrupt_setup() - Set up the IPA interrupt framework
+ * ipa_interrupt_config() - Configure the IPA interrupt framework
  * @ipa:       IPA pointer
  *
  * Return:     Pointer to IPA SMP2P info, or a pointer-coded error
  */
-struct ipa_interrupt *ipa_interrupt_setup(struct ipa *ipa);
+struct ipa_interrupt *ipa_interrupt_config(struct ipa *ipa);
 
 /**
- * ipa_interrupt_teardown() - Tear down the IPA interrupt framework
+ * ipa_interrupt_deconfig() - Inverse of ipa_interrupt_config()
  * @interrupt: IPA interrupt structure
  */
-void ipa_interrupt_teardown(struct ipa_interrupt *interrupt);
+void ipa_interrupt_deconfig(struct ipa_interrupt *interrupt);
 
 #endif /* _IPA_INTERRUPT_H_ */

diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c
index 47ed96dd49ab4fba9b2c0e545e873b8f354e2ab6..1c501fcea0c31275926eca81e562f956a964f43b 100644 (file)
--- a/drivers/net/ipa/ipa_main.c
+++ b/drivers/net/ipa/ipa_main.c
@@ -124,11 +124,6 @@ int ipa_setup(struct ipa *ipa)
        if (ret)
                return ret;
 
-       ipa->interrupt = ipa_interrupt_setup(ipa);
-       if (IS_ERR(ipa->interrupt)) {
-               ret = PTR_ERR(ipa->interrupt);
-               goto err_gsi_teardown;
-       }
        ipa_interrupt_add(ipa->interrupt, IPA_IRQ_TX_SUSPEND,
                          ipa_suspend_handler);
 
@@ -188,8 +183,6 @@ err_endpoint_teardown:
 err_uc_teardown:
        ipa_uc_teardown(ipa);
        ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_TX_SUSPEND);
-       ipa_interrupt_teardown(ipa->interrupt);
-err_gsi_teardown:
        gsi_teardown(&ipa->gsi);
 
        return ret;
@@ -214,7 +207,6 @@ static void ipa_teardown(struct ipa *ipa)
        (void)device_init_wakeup(&ipa->pdev->dev, false);
        ipa_uc_teardown(ipa);
        ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_TX_SUSPEND);
-       ipa_interrupt_teardown(ipa->interrupt);
        gsi_teardown(&ipa->gsi);
 }
 
@@ -472,9 +464,16 @@ static int ipa_config(struct ipa *ipa, const struct ipa_data *data)
        if (ret)
                goto err_hardware_deconfig;
 
+       ipa->interrupt = ipa_interrupt_config(ipa);
+       if (IS_ERR(ipa->interrupt)) {
+               ret = PTR_ERR(ipa->interrupt);
+               ipa->interrupt = NULL;
+               goto err_mem_deconfig;
+       }
+
        ret = ipa_endpoint_config(ipa);
        if (ret)
-               goto err_mem_deconfig;
+               goto err_interrupt_deconfig;
 
        ipa_table_config(ipa);          /* No deconfig required */
 
@@ -491,6 +490,9 @@ static int ipa_config(struct ipa *ipa, const struct ipa_data *data)
 
 err_endpoint_deconfig:
        ipa_endpoint_deconfig(ipa);
+err_interrupt_deconfig:
+       ipa_interrupt_deconfig(ipa->interrupt);
+       ipa->interrupt = NULL;
 err_mem_deconfig:
        ipa_mem_deconfig(ipa);
 err_hardware_deconfig:
@@ -508,6 +510,8 @@ static void ipa_deconfig(struct ipa *ipa)
 {
        ipa_modem_deconfig(ipa);
        ipa_endpoint_deconfig(ipa);
+       ipa_interrupt_deconfig(ipa->interrupt);
+       ipa->interrupt = NULL;
        ipa_mem_deconfig(ipa);
        ipa_hardware_deconfig(ipa);
        ipa_clock_put(ipa);