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authorAnatolij Gustschin <agust@denx.de>2018-11-26 17:35:27 (GMT)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-11-26 19:12:05 (GMT)
commit30522a951f9d02f261d0697c35cb42205b1fae17 (patch)
treef4387b10b0ae9bba29f76788bc4492c4cec3bd0e /drivers/fpga
parent324fa64cf4189094bc4df744a9e7214a1b81d845 (diff)
fpga: altera-cvp: fix probing for multiple FPGAs on the bus
Currently registering CvP managers works only for first probed CvP device, for all other devices it is refused due to duplicated chkcfg sysfs entry: fpga_manager fpga3: Altera CvP FPGA Manager @0000:0c:00.0 registered sysfs: cannot create duplicate filename '/bus/pci/drivers/altera-cvp/chkcfg' CPU: 0 PID: 3808 Comm: bash Tainted: G O 4.19.0-custom+ #5 Call Trace: dump_stack+0x46/0x5b sysfs_warn_dup+0x53/0x60 sysfs_add_file_mode_ns+0x16d/0x180 sysfs_create_file_ns+0x51/0x60 altera_cvp_probe+0x16f/0x2a0 [altera_cvp] local_pci_probe+0x3f/0xa0 ? pci_match_device+0xb1/0xf0 pci_device_probe+0x116/0x170 really_probe+0x21b/0x2c0 driver_probe_device+0x4b/0xe0 bind_store+0xcb/0x130 kernfs_fop_write+0xfd/0x180 __vfs_write+0x21/0x150 ? selinux_file_permission+0xdc/0x130 vfs_write+0xa8/0x1a0 ? find_vma+0xd/0x60 ksys_write+0x3d/0x90 do_syscall_64+0x44/0xf0 entry_SYSCALL_64_after_hwframe+0x44/0xa9 ... altera-cvp 0000:0c:00.0: Can't create sysfs chkcfg file fpga_manager fpga3: fpga_mgr_unregister Altera CvP FPGA Manager @0000:0c:00.0 Move chkcfg creation to module init as suggested by Alan. Signed-off-by: Anatolij Gustschin <agust@denx.de> Acked-by: Alan Tull <atull@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/fpga')
-rw-r--r--drivers/fpga/altera-cvp.c34
1 files changed, 24 insertions, 10 deletions
diff --git a/drivers/fpga/altera-cvp.c b/drivers/fpga/altera-cvp.c
index 7395085..35c3aa5 100644
--- a/drivers/fpga/altera-cvp.c
+++ b/drivers/fpga/altera-cvp.c
@@ -475,14 +475,6 @@ static int altera_cvp_probe(struct pci_dev *pdev,
if (ret)
goto err_unmap;
- ret = driver_create_file(&altera_cvp_driver.driver,
- &driver_attr_chkcfg);
- if (ret) {
- dev_err(&pdev->dev, "Can't create sysfs chkcfg file\n");
- fpga_mgr_unregister(mgr);
- goto err_unmap;
- }
-
return 0;
err_unmap:
@@ -501,7 +493,6 @@ static void altera_cvp_remove(struct pci_dev *pdev)
struct altera_cvp_conf *conf = mgr->priv;
u16 cmd;
- driver_remove_file(&altera_cvp_driver.driver, &driver_attr_chkcfg);
fpga_mgr_unregister(mgr);
if (conf->map)
pci_iounmap(pdev, conf->map);
@@ -511,7 +502,30 @@ static void altera_cvp_remove(struct pci_dev *pdev)
pci_write_config_word(pdev, PCI_COMMAND, cmd);
}
-module_pci_driver(altera_cvp_driver);
+static int __init altera_cvp_init(void)
+{
+ int ret;
+
+ ret = pci_register_driver(&altera_cvp_driver);
+ if (ret)
+ return ret;
+
+ ret = driver_create_file(&altera_cvp_driver.driver,
+ &driver_attr_chkcfg);
+ if (ret)
+ pr_warn("Can't create sysfs chkcfg file\n");
+
+ return 0;
+}
+
+static void __exit altera_cvp_exit(void)
+{
+ driver_remove_file(&altera_cvp_driver.driver, &driver_attr_chkcfg);
+ pci_unregister_driver(&altera_cvp_driver);
+}
+
+module_init(altera_cvp_init);
+module_exit(altera_cvp_exit);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>");

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