Eric Lee / smarc-fsl-linux-kernel

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Commit 75f1115c9b1a0c24d9025865285870122ec6f811

Authored by Greg Kroah-Hartman
1 parent 341487a837
Exists in master and in 39 other branches 8mp-imx_5.4.70_2.3.0, 8qm-imx_5.4.70_2.3.0, emb_imx_lf-5.15.y, emb_lf-6.1.y, imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, imx_4.1.15_1.0.0_ga, pitx_8mp_lf-5.10.y, rt-smarc-imx_4.1.15_1.0.0_ga, rt_linux_5.15.71, smarc-8m-android-11.0.0_2.0.0, smarc-imx6_4.14.98_2.0.0_ga, smarc-imx6_4.9.88_2.0.0_ga, smarc-imx7_4.14.98_2.0.0_ga, smarc-imx7_4.9.11_1.0.0_ga, smarc-imx7_4.9.88_2.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-imx_4.1.15_1.0.0_ga, smarc-imx_4.9.11_1.0.0_ga, smarc-imx_4.9.51_imx8m_ga, smarc-imx_4.9.88_2.0.0_ga, smarc-m6.0.1_2.1.0-ga, smarc-n7.1.2_2.0.0-ga, smarc-rel_imx_4.1.15_1.2.0_ga, smarc_8m_00d0_imx_4.14.98_2.0.0_ga, smarc_8m_imx_4.14.78_1.0.0_ga, smarc_8m_imx_4.14.98_2.0.0_ga, smarc_8m_imx_4.19.35_1.1.0, smarc_8mm_imx_4.14.78_1.0.0_ga, smarc_8mm_imx_4.14.98_2.0.0_ga, smarc_8mm_imx_4.19.35_1.1.0, smarc_8mm_imx_5.4.24_2.1.0, smarc_8mp_lf-5.10.y, smarc_8mq_imx_5.4.24_2.1.0, smarc_8mq_lf-5.10.y, smarc_imx_lf-5.15.y

PNP: stop using the subsystem rwsem 

The rwsem is not used to protect anything, so the use of it by the PNP
subsystem isn't really useful, and it's doubtful if it really did anything or
not.  So I've removed it.

Cc: Adam Belay <ambx1@neo.rr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

Showing 1 changed file with 0 additions and 6 deletions Side-by-side Diff

... ... @@ -311,7 +311,6 @@
311 311 return NULL;
312 312  
313 313 found:
314   - down_write(&dev->dev.bus->subsys.rwsem);
315 314 dev->card_link = clink;
316 315 dev->dev.driver = &drv->link.driver;
317 316 if (pnp_bus_type.probe(&dev->dev))
318 317  
... ... @@ -319,14 +318,11 @@
319 318 if (device_bind_driver(&dev->dev))
320 319 goto err_out;
321 320  
322   - up_write(&dev->dev.bus->subsys.rwsem);
323   -
324 321 return dev;
325 322  
326 323 err_out:
327 324 dev->dev.driver = NULL;
328 325 dev->card_link = NULL;
329   - up_write(&dev->dev.bus->subsys.rwsem);
330 326 return NULL;
331 327 }
332 328  
333 329  
... ... @@ -340,11 +336,9 @@
340 336 struct pnp_card_driver * drv = dev->card_link->driver;
341 337 if (!drv)
342 338 return;
343   - down_write(&dev->dev.bus->subsys.rwsem);
344 339 drv->link.remove = &card_remove;
345 340 device_release_driver(&dev->dev);
346 341 drv->link.remove = &card_remove_first;
347   - up_write(&dev->dev.bus->subsys.rwsem);
348 342 }
349 343  
350 344 /*