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| author | Nikolai Kondrashov <spbnick@gmail.com> | 2010-08-06 23:03:06 +0400 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2010-08-09 21:52:42 +0400 |
| commit | 73e4008ddddc84d5f2499c17012b340a0dae153e (patch) | |
| tree | d3adfa8c5792e71c21cb7a9cd18517cce9c92685 /drivers/hid/hid-cypress.c | |
| parent | 3cfc2c42c1cbc8e238bb9c0612c0df4565e3a8b4 (diff) | |
| download | linux-73e4008ddddc84d5f2499c17012b340a0dae153e.tar.xz | |
HID: allow resizing and replacing report descriptors
Update hid_driver's report_fixup prototype to allow changing report
descriptor size and/or returning completely different report descriptor.
Update existing usage accordingly.
This is to give more freedom in descriptor fixup and to allow having a whole
fixed descriptor in the code for the sake of readability.
Signed-off-by: Nikolai Kondrashov <spbnick@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-cypress.c')
| -rw-r--r-- | drivers/hid/hid-cypress.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/hid/hid-cypress.c b/drivers/hid/hid-cypress.c index 998b6f443d7d..4cd0e2345991 100644 --- a/drivers/hid/hid-cypress.c +++ b/drivers/hid/hid-cypress.c @@ -31,16 +31,16 @@ * Some USB barcode readers from cypress have usage min and usage max in * the wrong order */ -static void cp_report_fixup(struct hid_device *hdev, __u8 *rdesc, - unsigned int rsize) +static __u8 *cp_report_fixup(struct hid_device *hdev, __u8 *rdesc, + unsigned int *rsize) { unsigned long quirks = (unsigned long)hid_get_drvdata(hdev); unsigned int i; if (!(quirks & CP_RDESC_SWAPPED_MIN_MAX)) - return; + return rdesc; - for (i = 0; i < rsize - 4; i++) + for (i = 0; i < *rsize - 4; i++) if (rdesc[i] == 0x29 && rdesc[i + 2] == 0x19) { __u8 tmp; @@ -50,6 +50,7 @@ static void cp_report_fixup(struct hid_device *hdev, __u8 *rdesc, rdesc[i + 3] = rdesc[i + 1]; rdesc[i + 1] = tmp; } + return rdesc; } static int cp_input_mapped(struct hid_device *hdev, struct hid_input *hi, |