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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2019-08-06 19:50:50 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-08-15 17:58:37 +0200 |
| commit | 9bfe54e3b70e1d594a7fdc1e50043ab32e29eea7 (patch) | |
| tree | aa73e99b0f1f13faa7ae99982ac12cbce272eb4c /drivers/misc/xilinx_sdfec.c | |
| parent | e00feed03f8dcd3fd29b8da1cb21d0bad7eae10e (diff) | |
| download | linux-9bfe54e3b70e1d594a7fdc1e50043ab32e29eea7.tar.gz | |
xilinx_sdfec: Convert to IDA
This driver does not use the lookup abilities of the IDR, so convert it
to the more space-efficient IDA.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Link: https://lore.kernel.org/r/20190807025050.28367-1-willy@infradead.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/xilinx_sdfec.c')
| -rw-r--r-- | drivers/misc/xilinx_sdfec.c | 25 |
1 files changed, 6 insertions, 19 deletions
diff --git a/drivers/misc/xilinx_sdfec.c b/drivers/misc/xilinx_sdfec.c index 45f127ac12f6d3..912e939dec62e1 100644 --- a/drivers/misc/xilinx_sdfec.c +++ b/drivers/misc/xilinx_sdfec.c @@ -26,8 +26,7 @@ #define DEV_NAME_LEN 12 -static struct idr dev_idr; -static struct mutex dev_idr_lock; +static DEFINE_IDA(dev_nrs); /* Xilinx SDFEC Register Map */ /* CODE_WRI_PROTECT Register */ @@ -1374,13 +1373,6 @@ static void xsdfec_disable_all_clks(struct xsdfec_clks *clks) clk_disable_unprepare(clks->axi_clk); } -static void xsdfec_idr_remove(struct xsdfec_dev *xsdfec) -{ - mutex_lock(&dev_idr_lock); - idr_remove(&dev_idr, xsdfec->dev_id); - mutex_unlock(&dev_idr_lock); -} - static int xsdfec_probe(struct platform_device *pdev) { struct xsdfec_dev *xsdfec; @@ -1435,9 +1427,7 @@ static int xsdfec_probe(struct platform_device *pdev) } } - mutex_lock(&dev_idr_lock); - err = idr_alloc(&dev_idr, xsdfec->dev_name, 0, 0, GFP_KERNEL); - mutex_unlock(&dev_idr_lock); + err = ida_alloc(&dev_nrs, GFP_KERNEL); if (err < 0) goto err_xsdfec_dev; xsdfec->dev_id = err; @@ -1450,12 +1440,12 @@ static int xsdfec_probe(struct platform_device *pdev) err = misc_register(&xsdfec->miscdev); if (err) { dev_err(dev, "error:%d. Unable to register device", err); - goto err_xsdfec_idr; + goto err_xsdfec_ida; } return 0; -err_xsdfec_idr: - xsdfec_idr_remove(xsdfec); +err_xsdfec_ida: + ida_free(&dev_nrs, xsdfec->dev_id); err_xsdfec_dev: xsdfec_disable_all_clks(&xsdfec->clks); return err; @@ -1467,7 +1457,7 @@ static int xsdfec_remove(struct platform_device *pdev) xsdfec = platform_get_drvdata(pdev); misc_deregister(&xsdfec->miscdev); - xsdfec_idr_remove(xsdfec); + ida_free(&dev_nrs, xsdfec->dev_id); xsdfec_disable_all_clks(&xsdfec->clks); return 0; } @@ -1493,8 +1483,6 @@ static int __init xsdfec_init(void) { int err; - mutex_init(&dev_idr_lock); - idr_init(&dev_idr); err = platform_driver_register(&xsdfec_driver); if (err < 0) { pr_err("%s Unabled to register SDFEC driver", __func__); @@ -1506,7 +1494,6 @@ static int __init xsdfec_init(void) static void __exit xsdfec_exit(void) { platform_driver_unregister(&xsdfec_driver); - idr_destroy(&dev_idr); } module_init(xsdfec_init); |