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authorJon Smirl <jonsmirl@gmail.com>2008-05-11 14:37:04 -0400
committerJean Delvare <khali@hyperion.delvare>2008-05-11 14:37:04 -0400
commitf5fff3602a67ff8c98fccdbf15959780be542802 (patch)
tree16c93feec5711eb5139466156b680c2d68f50785 /drivers/i2c/busses
parent9662369786b9d07fd46d65b0f9e3938a3e01a5d9 (diff)
i2c-mpc: Compare to NO_IRQ instead of zero
Alter the mpc i2c driver to use the NO_IRQ symbol instead of the constant zero when checking for valid interrupts. NO_IRQ=-1 on ppc and NO_IRQ=0 on powerpc so the checks against zero are not correct. Signed-off-by: Jon Smirl <jonsmirl@gmail.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/i2c/busses')
-rw-r--r--drivers/i2c/busses/i2c-mpc.c16
1 files changed, 7 insertions, 9 deletions
diff --git a/drivers/i2c/busses/i2c-mpc.c b/drivers/i2c/busses/i2c-mpc.c
index 18beb0ad7bf3..a076129de7e8 100644
--- a/drivers/i2c/busses/i2c-mpc.c
+++ b/drivers/i2c/busses/i2c-mpc.c
@@ -99,7 +99,7 @@ static int i2c_wait(struct mpc_i2c *i2c, unsigned timeout, int writing)
99 u32 x; 99 u32 x;
100 int result = 0; 100 int result = 0;
101 101
102 if (i2c->irq == 0) 102 if (i2c->irq == NO_IRQ)
103 { 103 {
104 while (!(readb(i2c->base + MPC_I2C_SR) & CSR_MIF)) { 104 while (!(readb(i2c->base + MPC_I2C_SR) & CSR_MIF)) {
105 schedule(); 105 schedule();
@@ -329,10 +329,9 @@ static int fsl_i2c_probe(struct platform_device *pdev)
329 return -ENOMEM; 329 return -ENOMEM;
330 330
331 i2c->irq = platform_get_irq(pdev, 0); 331 i2c->irq = platform_get_irq(pdev, 0);
332 if (i2c->irq < 0) { 332 if (i2c->irq < 0)
333 result = -ENXIO; 333 i2c->irq = NO_IRQ; /* Use polling */
334 goto fail_get_irq; 334
335 }
336 i2c->flags = pdata->device_flags; 335 i2c->flags = pdata->device_flags;
337 init_waitqueue_head(&i2c->queue); 336 init_waitqueue_head(&i2c->queue);
338 337
@@ -344,7 +343,7 @@ static int fsl_i2c_probe(struct platform_device *pdev)
344 goto fail_map; 343 goto fail_map;
345 } 344 }
346 345
347 if (i2c->irq != 0) 346 if (i2c->irq != NO_IRQ)
348 if ((result = request_irq(i2c->irq, mpc_i2c_isr, 347 if ((result = request_irq(i2c->irq, mpc_i2c_isr,
349 IRQF_SHARED, "i2c-mpc", i2c)) < 0) { 348 IRQF_SHARED, "i2c-mpc", i2c)) < 0) {
350 printk(KERN_ERR 349 printk(KERN_ERR
@@ -367,12 +366,11 @@ static int fsl_i2c_probe(struct platform_device *pdev)
367 return result; 366 return result;
368 367
369 fail_add: 368 fail_add:
370 if (i2c->irq != 0) 369 if (i2c->irq != NO_IRQ)
371 free_irq(i2c->irq, i2c); 370 free_irq(i2c->irq, i2c);
372 fail_irq: 371 fail_irq:
373 iounmap(i2c->base); 372 iounmap(i2c->base);
374 fail_map: 373 fail_map:
375 fail_get_irq:
376 kfree(i2c); 374 kfree(i2c);
377 return result; 375 return result;
378}; 376};
@@ -384,7 +382,7 @@ static int fsl_i2c_remove(struct platform_device *pdev)
384 i2c_del_adapter(&i2c->adap); 382 i2c_del_adapter(&i2c->adap);
385 platform_set_drvdata(pdev, NULL); 383 platform_set_drvdata(pdev, NULL);
386 384
387 if (i2c->irq != 0) 385 if (i2c->irq != NO_IRQ)
388 free_irq(i2c->irq, i2c); 386 free_irq(i2c->irq, i2c);
389 387
390 iounmap(i2c->base); 388 iounmap(i2c->base);