Messages in this thread | | | Date | Wed, 23 Apr 2008 13:49:46 +0530 | From | "Midhun A" <> | Subject | Re: Userspace - Kernel Space "Connector" test |
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Hey,
I had changed the group number. It worked ! Thanks a lot for the help and also also the code !
Regards, Midhun
On Mon, Apr 21, 2008 at 4:13 PM, Evgeniy Polyakov <johnpol@2ka.mipt.ru> wrote: > Hi. > > > > On Mon, Apr 21, 2008 at 03:59:32PM +0530, Midhun A (midhunagni@gmail.com) wrote: > > static void imxmci_check_status(unsigned long data) > > { > > struct imxmci_host *host = (struct imxmci_host *)data; > > > > /*Netlink*/ > > struct cn_msg *m; > > char cn_data[32] = "SD/MMC Card Status"; > > /*Netlink*/ > > > > if( host->pdata->card_present() != host->present ) { > > host->present ^= 1; > > dev_info(mmc_dev(host->mmc), "card %s\n", > > host->present ? "inserted" : "removed"); > > > > /*Netlink*/ > > > > m = kmalloc(sizeof(*m) + sizeof(cn_data), GFP_ATOMIC); > > > > if (m) { > > printk("Inside if\n"); > > memset(m, 0, sizeof(*m) + sizeof(cn_data)); > > memcpy(&m->id, &cn_test_id, sizeof(m->id)); > > m->seq = cn_test_timer_counter; > > m->len = sizeof(cn_data); > > > > m->len = > > scnprintf(cn_data, sizeof(cn_data), "counter = %u", > > cn_test_timer_counter) + 1; > > > > memcpy(m + 1, data, m->len); > > printk("Copied Message\n"); > > cn_netlink_send(m, 0, gfp_any()); > > printk("Sent Message\n"); > > kfree(m); > > What is return value here? > Also, do you register this driver as connector user? If not, you can not > use 0 group number, since it will search only for registered kernel > side, and if there was no registration, it can not obtain address of the > userspace side. You can specify group (7 in your cae) as a parameter > instead. > > I suppose userspace was bound to (1<<7) group number or was subscribed > using socket option to 7'th group. > > -- > Evgeniy Polyakov >
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