V4L/DVB (4875): budget-ci IR: groundwork for following patches

This patch lays down some groundwork for later budget-ci patches. The bulk
of this consists of moving a few members into a new struct and renaming a
few of them.
It also allocates extra space for the device name (the "name" field in
/proc/bus/input/devices and in the relevant sysfs dir) to avoid truncation
and uses snprintf rather than sprintf in case the extra space shouldn't be
enough.
Taken from Darren Salt's dvb-ir patchset

Signed-off-by: Darren Salt <linux@youmustbejoking.demon.co.uk>
Signed-off-by: David Hardeman <david@hardeman.nu>
Signed-off-by: Andrew de Quincey <adq_dvb@lidskialf.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 19 insertions, 15 deletions

diff --git a/drivers/media/dvb/ttpci/budget-ci.c b/drivers/media/dvb/ttpci/budget-ci.c
index 25d0dfc1f585..2893e752745b 100644
--- a/drivers/media/dvb/ttpci/budget-ci.c
+++ b/drivers/media/dvb/ttpci/budget-ci.c
@@ -72,15 +72,19 @@
 #define SLOTSTATUS_READY        8
 #define SLOTSTATUS_OCCUPIED     (SLOTSTATUS_PRESENT|SLOTSTATUS_RESET|SLOTSTATUS_READY)
 
+struct budget_ci_ir {
+        struct input_dev *dev;
+        struct tasklet_struct msp430_irq_tasklet;
+        char name[72]; /* 40 + 32 for (struct saa7146_dev).name */
+};
+
 struct budget_ci {
         struct budget budget;
-        struct input_dev *input_dev;
-        struct tasklet_struct msp430_irq_tasklet;
         struct tasklet_struct ciintf_irq_tasklet;
         int slot_status;
         int ci_irq;
         struct dvb_ca_en50221 ca;
-        char ir_dev_name[50];
+        struct budget_ci_ir ir;
         u8 tuner_pll_address; /* used for philips_tdm1316l configs */
 };
 
@@ -156,7 +160,7 @@ static void msp430_ir_debounce(unsigned long data)
 static void msp430_ir_interrupt(unsigned long data)
 {
         struct budget_ci *budget_ci = (struct budget_ci *) data;
-        struct input_dev *dev = budget_ci->input_dev;
+        struct input_dev *dev = budget_ci->ir.dev;
         unsigned int code =
                 ttpci_budget_debiread(&budget_ci->budget, DEBINOSWAP, DEBIADDR_IR, 2, 1, 0) >> 8;
 
@@ -191,17 +195,17 @@ static void msp430_ir_interrupt(unsigned long data)
 static int msp430_ir_init(struct budget_ci *budget_ci)
 {
         struct saa7146_dev *saa = budget_ci->budget.dev;
-        struct input_dev *input_dev;
+        struct input_dev *input_dev = budget_ci->ir.dev;
         int i;
         int err;
 
-        input_dev = input_allocate_device();
+        budget_ci->ir.dev = input_dev = input_allocate_device();
         if (!input_dev)
                 return -ENOMEM;
 
-        sprintf(budget_ci->ir_dev_name, "Budget-CI dvb ir receiver %s", saa->name);
-
-        input_dev->name = budget_ci->ir_dev_name;
+        snprintf(budget_ci->ir.name, sizeof(budget_ci->ir.name),
+                 "Budget-CI dvb ir receiver %s", saa->name);
+        input_dev->name = budget_ci->ir.name;
 
         set_bit(EV_KEY, input_dev->evbit);
         for (i = 0; i < ARRAY_SIZE(key_map); i++)
@@ -214,9 +218,9 @@ static int msp430_ir_init(struct budget_ci *budget_ci)
                 return err;
         }
 
-        input_dev->timer.function = msp430_ir_debounce;
+        input_register_device(budget_ci->ir.dev);
 
-        budget_ci->input_dev = input_dev;
+        input_dev->timer.function = msp430_ir_debounce;
 
         saa7146_write(saa, IER, saa7146_read(saa, IER) | MASK_06);
         saa7146_setgpio(saa, 3, SAA7146_GPIO_IRQHI);
@@ -227,7 +231,7 @@ static int msp430_ir_init(struct budget_ci *budget_ci)
 static void msp430_ir_deinit(struct budget_ci *budget_ci)
 {
         struct saa7146_dev *saa = budget_ci->budget.dev;
-        struct input_dev *dev = budget_ci->input_dev;
+        struct input_dev *dev = budget_ci->ir.dev;
 
         saa7146_write(saa, IER, saa7146_read(saa, IER) & ~MASK_06);
         saa7146_setgpio(saa, 3, SAA7146_GPIO_INPUT);
@@ -548,7 +552,7 @@ static void budget_ci_irq(struct saa7146_dev *dev, u32 * isr)
         dprintk(8, "dev: %p, budget_ci: %p\n", dev, budget_ci);
 
         if (*isr & MASK_06)
-                tasklet_schedule(&budget_ci->msp430_irq_tasklet);
+                tasklet_schedule(&budget_ci->ir.msp430_irq_tasklet);
 
         if (*isr & MASK_10)
                 ttpci_budget_irq10_handler(dev, isr);
@@ -1105,7 +1109,7 @@ static int budget_ci_attach(struct saa7146_dev *dev, struct saa7146_pci_extensio
                 return err;
         }
 
-        tasklet_init(&budget_ci->msp430_irq_tasklet, msp430_ir_interrupt,
+        tasklet_init(&budget_ci->ir.msp430_irq_tasklet, msp430_ir_interrupt,
                      (unsigned long) budget_ci);
 
         msp430_ir_init(budget_ci);
@@ -1134,7 +1138,7 @@ static int budget_ci_detach(struct saa7146_dev *dev)
         }
         err = ttpci_budget_deinit(&budget_ci->budget);
 
-        tasklet_kill(&budget_ci->msp430_irq_tasklet);
+        tasklet_kill(&budget_ci->ir.msp430_irq_tasklet);
 
         msp430_ir_deinit(budget_ci);