diff options
| author | Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@teamlog.com> | 2006-12-10 21:21:29 +0100 |
|---|---|---|
| committer | Jean Delvare <khali@arrakis.delvare> | 2006-12-10 21:21:29 +0100 |
| commit | 31c095b09ea2fe6a4c752fccaabd9025e1c6e7c7 (patch) | |
| tree | 2d8c976933cca004c74a30a73bc109f6acc5acf3 /drivers/i2c/busses/i2c-ibm_iic.c | |
| parent | 41561f28e76a47dc6de0a954da85d0b5c42874eb (diff) | |
| download | lwn-31c095b09ea2fe6a4c752fccaabd9025e1c6e7c7.tar.gz lwn-31c095b09ea2fe6a4c752fccaabd9025e1c6e7c7.zip | |
i2c: Add request/release_mem_region to i2c-ibm_iic bus driver
Reserving I/O memory for a driver with request_mem_region is necessary to
avoid memory access conflicts. Even if it's never going to happen, it is
cleaner and it allows to monitor I/O memory used in /proc/iomem.
Signed-off-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@teamlog.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/i2c/busses/i2c-ibm_iic.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-ibm_iic.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-ibm_iic.c b/drivers/i2c/busses/i2c-ibm_iic.c index 781a99c1647a..1898e9987021 100644 --- a/drivers/i2c/busses/i2c-ibm_iic.c +++ b/drivers/i2c/busses/i2c-ibm_iic.c @@ -680,6 +680,12 @@ static int __devinit iic_probe(struct ocp_device *ocp){ dev->idx = ocp->def->index; ocp_set_drvdata(ocp, dev); + if (!request_mem_region(ocp->def->paddr, sizeof(struct iic_regs), + "ibm_iic")) { + ret = -EBUSY; + goto fail1; + } + if (!(dev->vaddr = ioremap(ocp->def->paddr, sizeof(struct iic_regs)))){ printk(KERN_CRIT "ibm-iic%d: failed to ioremap device registers\n", dev->idx); @@ -750,6 +756,8 @@ fail: iounmap(dev->vaddr); fail2: + release_mem_region(ocp->def->paddr, sizeof(struct iic_regs)); +fail1: ocp_set_drvdata(ocp, NULL); kfree(dev); return ret; @@ -777,6 +785,7 @@ static void __devexit iic_remove(struct ocp_device *ocp) free_irq(dev->irq, dev); } iounmap(dev->vaddr); + release_mem_region(ocp->def->paddr, sizeof(struct iic_regs)); kfree(dev); } } |