linux-dev/drivers/net/wireless/intersil/prism54, branch master

intersil: remove obsolete prism54 wireless driver

2021-08-06T08:55:28Z

Commit 1d89cae1b47d ("MAINTAINERS: mark prism54 obsolete") indicated the prism54 driver as obsolete in July 2010. Now, after being exposed for ten years to refactoring, general tree-wide changes and various janitor clean-up, it is really time to delete the driver for good. This was discovered as part of a checkpatch evaluation, investigating all reports of checkpatch's WARNING:OBSOLETE check. p54 replaces prism54 so users should be unaffected. There was a one off chipset someone long ago reported that p54 didn't work with but the reporter never followed up on that. Additionally, distributions have been blacklisting prism54 for years now. Signed-off-by: Lukas Bulwahn Acked-by: Luis Chamberlain Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20210713054025.32006-1-lukas.bulwahn@gmail.com

prism54: isl_ioctl: Fix one function header and demote another

2020-11-07T16:05:34Z

Fixes the following W=1 kernel build warning(s): from drivers/net/wireless/intersil/prism54/isl_ioctl.c:22: inlined from ‘prism54_get_name’ at drivers/net/wireless/intersil/prism54/isl_ioctl.c:283:2: drivers/net/wireless/intersil/prism54/isl_ioctl.c:68: warning: Function parameter or member 'priv' not described in 'prism54_mib_mode_helper' drivers/net/wireless/intersil/prism54/isl_ioctl.c:68: warning: Excess function parameter 'mib' description in 'prism54_mib_mode_helper' drivers/net/wireless/intersil/prism54/isl_ioctl.c:127: warning: Function parameter or member 'priv' not described in 'prism54_mib_init' Cc: Luis Chamberlain Cc: Kalle Valo Cc: "David S. Miller" Cc: Jakub Kicinski Cc: Aurelien Alleaume Cc: Valerio Riedel Cc: "Luis R. Rodriguez" Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: Lee Jones Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20201102112410.1049272-15-lee.jones@linaro.org

prism54: isl_ioctl: Remove unused variable 'j'

2020-09-01T13:14:51Z

Fixes the following W=1 kernel build warning(s): drivers/net/wireless/intersil/prism54/isl_ioctl.c: In function ‘prism54_update_stats’: drivers/net/wireless/intersil/prism54/isl_ioctl.c:166:6: warning: variable ‘j’ set but not used [-Wunused-but-set-variable] Cc: Luis Chamberlain Cc: Kalle Valo Cc: "David S. Miller" Cc: Jakub Kicinski Cc: Aurelien Alleaume Cc: Valerio Riedel Cc: "Luis R. Rodriguez" Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: Lee Jones Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200826093401.1458456-24-lee.jones@linaro.org

prism54: Use fallthrough pseudo-keyword

2020-08-27T13:06:29Z

Replace the existing /* fall through */ comments and its variants with the new pseudo-keyword macro fallthrough[1]. [1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Signed-off-by: Gustavo A. R. Silva Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200821062947.GA10202@embeddedor

intersil: fix wiki website url

2020-08-02T15:23:21Z

In some Intersil files, the wiki url is still the old "wireless.kernel.org" instead of the new "wireless.wiki.kernel.org" Signed-off-by: Flavio Suligoi Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200723135254.594984-1-f.suligoi@asem.it

prism54: switch from 'pci_' to 'dma_' API

2020-08-02T14:59:40Z

The wrappers in include/linux/pci-dma-compat.h should go away. The patch has been generated with the coccinelle script below and has been hand modified to replace GFP_ with a correct flag. It has been compile tested. When memory is allocated in 'islpci_alloc_memory()' (islpci_dev.c), GFP_KERNEL can be used because it is only called from a probe function and no spin_lock is taken in the between. The call chain is: prism54_probe (probe function, in 'islpci_hotplug.c') --> islpci_setup (in 'islpci_dev.c') --> islpci_alloc_memory (in 'islpci_dev.c') @@ @@ - PCI_DMA_BIDIRECTIONAL + DMA_BIDIRECTIONAL @@ @@ - PCI_DMA_TODEVICE + DMA_TO_DEVICE @@ @@ - PCI_DMA_FROMDEVICE + DMA_FROM_DEVICE @@ @@ - PCI_DMA_NONE + DMA_NONE @@ expression e1, e2, e3; @@ - pci_alloc_consistent(e1, e2, e3) + dma_alloc_coherent(&e1->dev, e2, e3, GFP_) @@ expression e1, e2, e3; @@ - pci_zalloc_consistent(e1, e2, e3) + dma_alloc_coherent(&e1->dev, e2, e3, GFP_) @@ expression e1, e2, e3, e4; @@ - pci_free_consistent(e1, e2, e3, e4) + dma_free_coherent(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_map_single(e1, e2, e3, e4) + dma_map_single(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_unmap_single(e1, e2, e3, e4) + dma_unmap_single(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4, e5; @@ - pci_map_page(e1, e2, e3, e4, e5) + dma_map_page(&e1->dev, e2, e3, e4, e5) @@ expression e1, e2, e3, e4; @@ - pci_unmap_page(e1, e2, e3, e4) + dma_unmap_page(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_map_sg(e1, e2, e3, e4) + dma_map_sg(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_unmap_sg(e1, e2, e3, e4) + dma_unmap_sg(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_dma_sync_single_for_cpu(e1, e2, e3, e4) + dma_sync_single_for_cpu(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_dma_sync_single_for_device(e1, e2, e3, e4) + dma_sync_single_for_device(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_dma_sync_sg_for_cpu(e1, e2, e3, e4) + dma_sync_sg_for_cpu(&e1->dev, e2, e3, e4) @@ expression e1, e2, e3, e4; @@ - pci_dma_sync_sg_for_device(e1, e2, e3, e4) + dma_sync_sg_for_device(&e1->dev, e2, e3, e4) @@ expression e1, e2; @@ - pci_dma_mapping_error(e1, e2) + dma_mapping_error(&e1->dev, e2) @@ expression e1, e2; @@ - pci_set_dma_mask(e1, e2) + dma_set_mask(&e1->dev, e2) @@ expression e1, e2; @@ - pci_set_consistent_dma_mask(e1, e2) + dma_set_coherent_mask(&e1->dev, e2) Signed-off-by: Christophe JAILLET Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200722104534.30760-1-christophe.jaillet@wanadoo.fr

prism54: islpci_hotplug: use generic power management

2020-08-02T14:58:56Z

Drivers using legacy power management .suspen()/.resume() callbacks have to manage PCI states and device's PM states themselves. They also need to take care of standard configuration registers. Switch to generic power management framework using a single "struct dev_pm_ops" variable to take the unnecessary load from the driver. This also avoids the need for the driver to directly call most of the PCI helper functions and device power state control functions as through the generic framework, PCI Core takes care of the necessary operations, and drivers are required to do only device-specific jobs. Signed-off-by: Vaibhav Gupta Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200721125514.145607-1-vaibhavgupta40@gmail.com

prism54: Replace HTTP links with HTTPS ones

2020-08-02T14:58:30Z

Rationale: Reduces attack surface on kernel devs opening the links for MITM as HTTPS traffic is much harder to manipulate. Deterministic algorithm: For each file: If not .svg: For each line: If doesn't contain `\bxmlns\b`: For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`: If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`: If both the HTTP and HTTPS versions return 200 OK and serve the same content: Replace HTTP with HTTPS. Signed-off-by: Alexander A. Klimov Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200719121224.58581-1-grandmaster@al2klimov.de

prism54: Replace zero-length array with flexible-array

2020-05-12T08:55:48Z

The current codebase makes use of the zero-length array language extension to the C90 standard, but the preferred mechanism to declare variable-length types such as these ones is a flexible array member[1][2], introduced in C99: struct foo { int stuff; struct boo array[]; }; By making use of the mechanism above, we will get a compiler warning in case the flexible array does not occur last in the structure, which will help us prevent some kind of undefined behavior bugs from being inadvertently introduced[3] to the codebase from now on. Also, notice that, dynamic memory allocations won't be affected by this change: "Flexible array members have incomplete type, and so the sizeof operator may not be applied. As a quirk of the original implementation of zero-length arrays, sizeof evaluates to zero."[1] sizeof(flexible-array-member) triggers a warning because flexible array members have incomplete type[1]. There are some instances of code in which the sizeof operator is being incorrectly/erroneously applied to zero-length arrays and the result is zero. Such instances may be hiding some bugs. So, this work (flexible-array member conversions) will also help to get completely rid of those sorts of issues. This issue was found with the help of Coccinelle. [1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html [2] https://github.com/KSPP/linux/issues/21 [3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour") Signed-off-by: Gustavo A. R. Silva Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200507190210.GA15375@embeddedor

prism54: Use scnprintf() for avoiding potential buffer overflow

2020-03-12T13:43:41Z

Since snprintf() returns the would-be-output size instead of the actual output size, the succeeding calls may go beyond the given buffer limit. Fix it by replacing with scnprintf(). Cc: Luis Chamberlain Signed-off-by: Takashi Iwai Signed-off-by: Kalle Valo